From list at mikebeauchamp.com  Wed Apr  3 07:17:57 2013
From: list at mikebeauchamp.com (Mike Beauchamp)
Date: Wed, 03 Apr 2013 01:17:57 -0400
Subject: [sdiy] IDC connector reliability?
Message-ID: <1364966277.1871.458.camel@nwwtlaptop>

What is your opinion on IDC connectors and reliability? I'm wanting to
use these to carry power, audio and control voltages between boards to
save some time wiring and make things a bit cleaner. 

I do see that there are gold plated options, but I'd really like to hear
about the long term reliability of these connections in actual use.






From ceratos at shaw.ca  Wed Apr  3 07:38:44 2013
From: ceratos at shaw.ca (Jim Blair)
Date: Tue, 02 Apr 2013 22:38:44 -0700
Subject: [sdiy] Arp ProSoloist...strange behavior.
Message-ID: <20130403053845.8B4091D1F887@dropmix.xs4all.nl>

I just picked up a second ProSoloist (kind of the third, if you count 
the ProDGX). This one sat in a closet for 40 years, then restored. 
Perfect condition. Except for one thing....

Both of the "Fuzz Guitar" presets behave oddly. It seems like they 
sort of "cycle through" slightly different waveforms. Sine, square, 
saw, etc. Abruptly, almost like someone reciting vowels. also, Fuzz 
Guitar 1 is kind of quiet, while Fuzz Guitar 2 is really loud.

Everything else is great.


Any suggestions?



Thanks,

Jim 



From dixon at mail.ubc.ca  Wed Apr  3 08:29:31 2013
From: dixon at mail.ubc.ca (David G Dixon)
Date: Tue, 2 Apr 2013 23:29:31 -0700
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <1364966277.1871.458.camel@nwwtlaptop>
References: <1364966277.1871.458.camel@nwwtlaptop>
Message-ID: <D6611B6BBA464CFAB3AAD642081CBED0@galvanox01>

> What is your opinion on IDC connectors and reliability? I'm 
> wanting to use these to carry power, audio and control 
> voltages between boards to save some time wiring and make 
> things a bit cleaner. 
> 
> I do see that there are gold plated options, but I'd really 
> like to hear about the long term reliability of these 
> connections in actual use.

I've never used IDC connectors, but I use the sort of crimp-pin connectors
shown here:

https://www.sparkfun.com/products/8100

and I love 'em!  I've never had a single problem with them.  I use a tool a
lot like the one shown here:

http://www.parts-express.com/pe/showdetl.cfm?partnumber=092-580

(I never solder them or use needle-nose pliers on them.)  I've never had one
fail or lose its connection.



From jarno.verhoeven at ziggo.nl  Wed Apr  3 09:29:16 2013
From: jarno.verhoeven at ziggo.nl (J. Verhoeven)
Date: Wed, 03 Apr 2013 09:29:16 +0200
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <7710a33c1ed7f.515bda18@ziggo.nl>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<76e09ee01cd95.515bd99c@ziggo.nl> <761088041ee02.515bd9da@ziggo.nl>
	<7710a33c1ed7f.515bda18@ziggo.nl>
Message-ID: <7650a7a91a586.515bf66c@ziggo.nl>

Gold plating will help with the number of matings and contact resistance, not sure if either of these are really critical in synth applications. From a power distribution standpoint, I think the main objection to IDC is the limit on wire gauge. 
Making the standard eurorack cables really is very easy with IDC, especially with a dedicated tool.

I never had one fail (el-cheapo DIL sockets on the other hand.....), but I am by no means a veteran.

Best regards,

Jarno.
?

On 04/03/13, Mike Beauchamp <list at mikebeauchamp.com> wrote:
> What is your opinion on IDC connectors and reliability? I'm wanting to
> use these to carry power, audio and control voltages between boards to
> save some time wiring and make things a bit cleaner. 
> 
> I do see that there are gold plated options, but I'd really like to hear
> about the long term reliability of these connections in actual use.
> 
> 
> 
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
>


From pfperry at melbpc.org.au  Wed Apr  3 09:32:56 2013
From: pfperry at melbpc.org.au (Paul Perry)
Date: Wed, 3 Apr 2013 18:32:56 +1100
Subject: [sdiy] IDC connector reliability?
References: <1364966277.1871.458.camel@nwwtlaptop>
	<D6611B6BBA464CFAB3AAD642081CBED0@galvanox01>
Message-ID: <EDB876F2C39447DDB8D3FA591E33384A@ownerf0d9273f5>

I'm a believer.
I've made hundreds and hundreds. They work.

And here's a thought.. there are plenty of them in computers, right?

paul perry Melbourne Australia



From neil.johnson97 at ntlworld.com  Wed Apr  3 10:37:27 2013
From: neil.johnson97 at ntlworld.com (Neil Johnson)
Date: Wed, 3 Apr 2013 09:37:27 +0100
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <1364966277.1871.458.camel@nwwtlaptop>
References: <1364966277.1871.458.camel@nwwtlaptop>
Message-ID: <CAEaByMSMcAMf18YZkchU27kVH+QjZwzgXWw=T=K1CehjHnL+0w@mail.gmail.com>

Hi,

Mike Beauchamp wrote:
> What is your opinion on IDC connectors and reliability? I'm wanting to
> use these to carry power, audio and control voltages between boards to
> save some time wiring and make things a bit cleaner.
>
> I do see that there are gold plated options, but I'd really like to hear
> about the long term reliability of these connections in actual use.

If you're looking at low-voltage and low-current circuits then IDC is
definitely effective.  As always check the specs of the parts you are
going to buy.  One nice thing about IDC connectors is that, even with
a vice and a bit of care and attention, you're very likely to make a
very good crimp connection.

Regarding long term use, it really depends on the operating
environment.  A dry, stable room temperature environment will be
great, sloshing around in salty water on a ship's deck at extremes of
temperature is not so good.  If your environment will experience some
vibration (perhaps a portable modular?), then I'd suggest using the
latching headers for improved header retention.

And as Paul says, they've been used in computers for decades!

Cheers,
Neil
-- 
Modules and more: http://www.cesyg.com
Homepage: http://www.njohnson.co.uk


From elby_designs at ozemail.com.au  Wed Apr  3 10:39:23 2013
From: elby_designs at ozemail.com.au (Laurie Biddulph)
Date: Wed, 03 Apr 2013 19:39:23 +1100
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <EDB876F2C39447DDB8D3FA591E33384A@ownerf0d9273f5>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<D6611B6BBA464CFAB3AAD642081CBED0@galvanox01>
	<EDB876F2C39447DDB8D3FA591E33384A@ownerf0d9273f5>
Message-ID: <515BEABB.2010502@ozemail.com.au>

True, there are a lot of them out there but if you check with the 
manufacturer you will find the insertion/removal figure is quite low. So 
great for one off connections, not so good if you intend to regularly 
move your modules around.

With a previous employer we were looking for high insertion cables and 
was amazed to find that something like a regular DB9  is actually very 
poor in this regard

Best Regards
Laurie Biddulph

Phone: +61 (0)2 4340 0938
Mobile: +61 0400 257 645
Website: www.elby-designs.com
Skype: widgetoz

On 3/04/2013 6:32 PM, Paul Perry wrote:
> I'm a believer.
> I've made hundreds and hundreds. They work.
>
> And here's a thought.. there are plenty of them in computers, right?
>
> paul perry Melbourne Australia
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>



From jarno.verhoeven at ziggo.nl  Wed Apr  3 10:42:39 2013
From: jarno.verhoeven at ziggo.nl (J. Verhoeven)
Date: Wed, 03 Apr 2013 10:42:39 +0200
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <76f0a5e9c6adf.515beb61@ziggo.nl>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<D6611B6BBA464CFAB3AAD642081CBED0@galvanox01>
	<EDB876F2C39447DDB8D3FA591E33384A@ownerf0d9273f5>
	<7740a761c10de.515bea6c@ziggo.nl> <7740f1a8c51de.515beaa8@ziggo.nl>
	<7760c40ac368d.515beae5@ziggo.nl> <77409e17c4b07.515beb24@ziggo.nl>
	<76f0a5e9c6adf.515beb61@ziggo.nl>
Message-ID: <77c09715c6a93.515c079f@ziggo.nl>

Additionally, I work for TE, and looked up a comparable partnumber. There's a product spec available on the TE website, 108-25034.
This being a product spec (and not design objectives) means that the parts have undergone the complete testcycle in the spec, you can judge for yourself if the conditions in your cabinets are 
more severe than this, -65 to 105 deg C, cycling with 95% humidity etc.

Pretty known, and proven technology I'd say.


From fanwander at mnet-online.de  Wed Apr  3 13:22:13 2013
From: fanwander at mnet-online.de (Florian Anwander)
Date: Wed, 03 Apr 2013 13:22:13 +0200
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <1364966277.1871.458.camel@nwwtlaptop>
References: <1364966277.1871.458.camel@nwwtlaptop>
Message-ID: <515C10E5.3000006@mnet-online.de>

Hello

Am 03.04.2013 07:17, schrieb Mike Beauchamp:
> What is your opinion on IDC connectors and reliability? I'm wanting to
> use these to carry power, audio and control voltages between boards to
> save some time wiring and make things a bit cleaner.
Laurie mentioned alread the low on/off cycle count.

I'd like to add, that there are two parties involved:

The connector and the socket on the pcb. In this case the socket is a 
pinhead. I found that simple pinheads with no housing a prone to be bent 
if the connector is not pulled carefully. But even the pins in sockets 
with housing can be bent if you lever out the connector instead of 
pulling it in a straight angle. This can happen especially with wider 
connectors. For example the bus in my Yamaha mixing console is 
constructed with IDCs, and the former owner managed it to bend one 
pinhead that much while removing the connector, that the pin was 
"crumpled" when he tried to reinsert the connector.

If you use pinheads with no housing you also should be sure, that there 
is no danger of a lateral load. I once unscrewed a Doepfer A-155 from 
the rack, the module fell out and the power cable pulled that unluckily 
on the the pinhead, that the pinhead was bent that much that I had to 
replace it. I think this happened because I used a quite long 
(testing-)cable (more than one meter), so the module could gather more 
gravity acceleration than usual - and also the A-155 is quite heavy in 
comparison to other modules. But nevertheless it should be considered.

Florian


From cheater00 at gmail.com  Wed Apr  3 13:41:38 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Wed, 3 Apr 2013 13:41:38 +0200
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <7650a7a91a586.515bf66c@ziggo.nl>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<76e09ee01cd95.515bd99c@ziggo.nl>
	<761088041ee02.515bd9da@ziggo.nl> <7710a33c1ed7f.515bda18@ziggo.nl>
	<7650a7a91a586.515bf66c@ziggo.nl>
Message-ID: <CA+9GZUh7c08sMbkWOSCP9JPGN6AV1i=Cqx5Kzaa-91CCag4S-Q@mail.gmail.com>

Hi Jarno,


On Wed, Apr 3, 2013 at 9:29 AM, J. Verhoeven <jarno.verhoeven at ziggo.nl> wrote:
> Gold plating will help with the number of matings and contact resistance,

Not really true. Gold does not help with the number of matings, unless
it's PVD gold plating, in which case what helps with the number is the
substrate the gold is applied to.

Gold is used to prevent oxidation when there are long periods between
mating cycles.

If you want self-healing contacts, you use silver. They increase the
number of possible matings considerably, however you *have* to cycle
the connection, otherwise the surface covers in sulfides and you have
to clean it up. Quite often cleaning up means just mating the
connector a good several times until the sulfides have been scratched
off. For more severe cases you can mate with a steel or brass
connector made specifically for that purpose.

> I never had one fail (el-cheapo DIL sockets on the other hand.....), but I am by no means a veteran.

Now here's a good reason to start using gold: DIL sockets. Aluminum
ones fail because alu frost grows and grows until it grows between the
socket and the chip's pin and creates a non-conductive layer. Gold
doesn't do that. I am not sure, but I believe that it also prevents
the alu from building too much frost around the area where it's mated
with gold, because of some electronegativity magic that I all but
forgot.

Cheers,
D.

>> What is your opinion on IDC connectors and reliability? I'm wanting to
>> use these to carry power, audio and control voltages between boards to
>> save some time wiring and make things a bit cleaner.
>>
>> I do see that there are gold plated options, but I'd really like to hear
>> about the long term reliability of these connections in actual use.
>>
>>
>>
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From neil.johnson97 at ntlworld.com  Wed Apr  3 14:38:21 2013
From: neil.johnson97 at ntlworld.com (Neil Johnson)
Date: Wed, 3 Apr 2013 13:38:21 +0100
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <CA+9GZUh7c08sMbkWOSCP9JPGN6AV1i=Cqx5Kzaa-91CCag4S-Q@mail.gmail.com>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<76e09ee01cd95.515bd99c@ziggo.nl> <761088041ee02.515bd9da@ziggo.nl>
	<7710a33c1ed7f.515bda18@ziggo.nl> <7650a7a91a586.515bf66c@ziggo.nl>
	<CA+9GZUh7c08sMbkWOSCP9JPGN6AV1i=Cqx5Kzaa-91CCag4S-Q@mail.gmail.com>
Message-ID: <CAEaByMRbxPvy_4=EFi5__nO6mwknYx84SHjEf3c+GbN3QW4bFw@mail.gmail.com>

cheater cheater <cheater00 at gmail.com> wrote:
> Hi Jarno,
>
>
> On Wed, Apr 3, 2013 at 9:29 AM, J. Verhoeven <jarno.verhoeven at ziggo.nl> wrote:
>> Gold plating will help with the number of matings and contact resistance,
>
> Not really true. Gold does not help with the number of matings, unless
> it's PVD gold plating, in which case what helps with the number is the
> substrate the gold is applied to.
>
> Gold is used to prevent oxidation when there are long periods between
> mating cycles.
>
> If you want self-healing contacts, you use silver. They increase the
> number of possible matings considerably, however you *have* to cycle
> the connection, otherwise the surface covers in sulfides and you have
> to clean it up. Quite often cleaning up means just mating the
> connector a good several times until the sulfides have been scratched
> off. For more severe cases you can mate with a steel or brass
> connector made specifically for that purpose.

Gold: http://www.te.com/documentation/whitepapers/pdf/aurulrep.pdf

Silver: http://www.te.com/documentation/whitepapers/pdf/Ag_use_connectors_503-1016.pdf

Neil
-- 
Modules and more: http://www.cesyg.com
Homepage: http://www.njohnson.co.uk


From jarno.verhoeven at ziggo.nl  Wed Apr  3 14:54:52 2013
From: jarno.verhoeven at ziggo.nl (J. Verhoeven)
Date: Wed, 03 Apr 2013 14:54:52 +0200
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <75b0e364c07cc.515c266f@ziggo.nl>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<76e09ee01cd95.515bd99c@ziggo.nl> <761088041ee02.515bd9da@ziggo.nl>
	<7710a33c1ed7f.515bda18@ziggo.nl> <7650a7a91a586.515bf66c@ziggo.nl>
	<CA+9GZUh7c08sMbkWOSCP9JPGN6AV1i=Cqx5Kzaa-91CCag4S-Q@mail.gmail.com>
	<CAEaByMRbxPvy_4=EFi5__nO6mwknYx84SHjEf3c+GbN3QW4bFw@mail.gmail.com>
	<7540adb4c081d.515c25f0@ziggo.nl> <75f0a8a6c733a.515c262e@ziggo.nl>
	<75b0e364c07cc.515c266f@ziggo.nl>
Message-ID: <75a099f4c6cb6.515c42bc@ziggo.nl>

LOL, well there you go :-)

Interestingly, the second document is a 503 type which we do not use very often (internally TE Connectivity in NL), but I want to start using again (because it takes ages for the testlab to make a testreport, and this type allows us engineers to do our own testreport). Just talked to our documentation guy today about this.



On 04/03/13, Neil Johnson <neil.johnson97 at ntlworld.com> wrote:
> cheater cheater <cheater00 at gmail.com> wrote:
> > Hi Jarno,
> >
> >
> > On Wed, Apr 3, 2013 at 9:29 AM, J. Verhoeven <jarno.verhoeven at ziggo.nl> wrote:
> >> Gold plating will help with the number of matings and contact resistance,
> >
> > Not really true. Gold does not help with the number of matings, unless
> > it's PVD gold plating, in which case what helps with the number is the
> > substrate the gold is applied to.
> >
> > Gold is used to prevent oxidation when there are long periods between
> > mating cycles.
> >
> > If you want self-healing contacts, you use silver. They increase the
> > number of possible matings considerably, however you *have* to cycle
> > the connection, otherwise the surface covers in sulfides and you have
> > to clean it up. Quite often cleaning up means just mating the
> > connector a good several times until the sulfides have been scratched
> > off. For more severe cases you can mate with a steel or brass
> > connector made specifically for that purpose.
> 
> Gold: http://www.te.com/documentation/whitepapers/pdf/aurulrep.pdf
> 
> Silver: http://www.te.com/documentation/whitepapers/pdf/Ag_use_connectors_503-1016.pdf
> 
> Neil
> -- 
> Modules and more: http://www.cesyg.com
> Homepage: http://www.njohnson.co.uk
> 
>


From cheater00 at gmail.com  Wed Apr  3 14:55:16 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Wed, 3 Apr 2013 14:55:16 +0200
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <CAEaByMRbxPvy_4=EFi5__nO6mwknYx84SHjEf3c+GbN3QW4bFw@mail.gmail.com>
References: <1364966277.1871.458.camel@nwwtlaptop>
	<76e09ee01cd95.515bd99c@ziggo.nl>
	<761088041ee02.515bd9da@ziggo.nl> <7710a33c1ed7f.515bda18@ziggo.nl>
	<7650a7a91a586.515bf66c@ziggo.nl>
	<CA+9GZUh7c08sMbkWOSCP9JPGN6AV1i=Cqx5Kzaa-91CCag4S-Q@mail.gmail.com>
	<CAEaByMRbxPvy_4=EFi5__nO6mwknYx84SHjEf3c+GbN3QW4bFw@mail.gmail.com>
Message-ID: <CA+9GZUgAHGARvik5WM67HJUzzCAqAG_GtDpa-aZj3xMgVYSrqw@mail.gmail.com>

Neil,

On Wed, Apr 3, 2013 at 2:38 PM, Neil Johnson
<neil.johnson97 at ntlworld.com> wrote:
> Gold: http://www.te.com/documentation/whitepapers/pdf/aurulrep.pdf
>
> Silver: http://www.te.com/documentation/whitepapers/pdf/Ag_use_connectors_503-1016.pdf

Those are really, really nice! I'll be sure to read those as soon as I
have a little more time. Thanks a lot for the links.

Cheers,
D.


From tom at electricdruid.net  Wed Apr  3 15:42:21 2013
From: tom at electricdruid.net (Tom Wiltshire)
Date: Wed, 3 Apr 2013 14:42:21 +0100
Subject: [sdiy] Inspired by the Buchla Music Easel
Message-ID: <FFEE4144-B6D6-4C4D-8F51-F19611F5C5B6@electricdruid.net>

Hi All,

Manu wrote to me the other day to show me what he'd been up. His synth includes some of my PICs, hence the email, but also many designs from many people here on the list. He described it as "Moog and Buchla shake hands", which has got to be a good thing! ;)

I thought it was excellent work and worth sharing:

	http://studiomanus.com/EMB.htm

Now he's done building, he's recording with it:

	http://sigma2.bandcamp.com/

Enjoy!

Tom



From cheater00 at gmail.com  Wed Apr  3 17:28:48 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Wed, 3 Apr 2013 17:28:48 +0200
Subject: [sdiy] Inspired by the Buchla Music Easel
In-Reply-To: <FFEE4144-B6D6-4C4D-8F51-F19611F5C5B6@electricdruid.net>
References: <FFEE4144-B6D6-4C4D-8F51-F19611F5C5B6@electricdruid.net>
Message-ID: <CA+9GZUgWnnGEvgnEioiy6usmCzWNWQ0FMx95dpjNQDwz0aQy2Q@mail.gmail.com>

wow, this guy's really good!

On Wed, Apr 3, 2013 at 3:42 PM, Tom Wiltshire <tom at electricdruid.net> wrote:
> Hi All,
>
> Manu wrote to me the other day to show me what he'd been up. His synth includes some of my PICs, hence the email, but also many designs from many people here on the list. He described it as "Moog and Buchla shake hands", which has got to be a good thing! ;)
>
> I thought it was excellent work and worth sharing:
>
>         http://studiomanus.com/EMB.htm
>
> Now he's done building, he's recording with it:
>
>         http://sigma2.bandcamp.com/
>
> Enjoy!
>
> Tom
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From jspeth at avnera.com  Wed Apr  3 18:03:14 2013
From: jspeth at avnera.com (John Speth)
Date: Wed, 3 Apr 2013 09:03:14 -0700
Subject: [sdiy] IDC connector reliability?
In-Reply-To: <1364966277.1871.458.camel@nwwtlaptop>
References: <1364966277.1871.458.camel@nwwtlaptop>
Message-ID: <760a0690df744ba81829c4f1b052a2be@mail.gmail.com>

> What is your opinion on IDC connectors and reliability? I'm wanting to
use
> these to carry power, audio and control voltages between boards to save
some
> time wiring and make things a bit cleaner.
>
> I do see that there are gold plated options, but I'd really like to hear
> about the long term reliability of these connections in actual use.

While the long term reliability is evident in the billions of computers
that have been in use for decades, I have personal story that shows the
downside: I recently resurrected a 1985 vintage PC.  It had one problem
after booting.  The floppy drive no longer worked because the double row
IDC connector contacts had lost their spring pressure because of the
decades of pressure on the contact.  A few plug-ins/removals and it
started working again.  I doubt it would survive a ride in a car without
having to reseat it.

It's a long well known problem about springs in general: They lose their
force over time under compression.  I suppose how badly depends on the
material used.

Fortunately most consumer grade equipment will not be in service for
decades.

JJS


From niroke at tampabay.rr.com  Wed Apr  3 20:09:23 2013
From: niroke at tampabay.rr.com (Nicholas Keller)
Date: Wed, 3 Apr 2013 14:09:23 -0400
Subject: [sdiy] Inspired by the Buchla Music Easel
In-Reply-To: <FFEE4144-B6D6-4C4D-8F51-F19611F5C5B6@electricdruid.net>
References: <FFEE4144-B6D6-4C4D-8F51-F19611F5C5B6@electricdruid.net>
Message-ID: <10FD7646-8C86-4742-8E66-907EE4F0ABBE@tampabay.rr.com>

Cool!  Tap tempo LFOs?!  Got to get a few of those...

NK 

Sent from the future

On Apr 3, 2013, at 9:42 AM, Tom Wiltshire <tom at electricdruid.net> wrote:

> Hi All,
> 
> Manu wrote to me the other day to show me what he'd been up. His synth includes some of my PICs, hence the email, but also many designs from many people here on the list. He described it as "Moog and Buchla shake hands", which has got to be a good thing! ;)
> 
> I thought it was excellent work and worth sharing:
> 
>    http://studiomanus.com/EMB.htm
> 
> Now he's done building, he's recording with it:
> 
>    http://sigma2.bandcamp.com/
> 
> Enjoy!
> 
> Tom
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From sounddoctorin at imt.net  Wed Apr  3 21:43:46 2013
From: sounddoctorin at imt.net (Bob Weigel)
Date: Wed, 03 Apr 2013 13:43:46 -0600
Subject: [sdiy] Arp ProSoloist...strange behavior.
In-Reply-To: <20130403053845.8B4091D1F887@dropmix.xs4all.nl>
References: <20130403053845.8B4091D1F887@dropmix.xs4all.nl>
Message-ID: <515C8672.3080900@imt.net>

On 4/2/2013 11:38 PM, Jim Blair wrote:
> I just picked up a second ProSoloist (kind of the third, if you count 
> the ProDGX). This one sat in a closet for 40 years, then restored. 
> Perfect condition. Except for one thing....
>
> Both of the "Fuzz Guitar" presets behave oddly. It seems like they 
> sort of "cycle through" slightly different waveforms. Sine, square, 
> saw, etc. Abruptly, almost like someone reciting vowels. also, Fuzz 
> Guitar 1 is kind of quiet, while Fuzz Guitar 2 is really loud.
>
> Everything else is great.
>
>
> Any suggestions?
>
>
>
> Thanks,
>
> Jim
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
Hmm.  Well are the sounds it cycles through affect by other tabs that 
are down?  Eg. if you put all tabs up does it cease cycling?  If so 
maybe the switch is intermittent.  Otherwise, the principle of operation 
is this.  The logic is supposed to only recognize the furthest right 
switch that is engaged.  From that it establishes an address that is fed 
to a series of ROM chips. These chips' outputs then are attached to 
various things.  For example a feedback in an op amp filter circuit 
where if that line is high it allows the function but if low it defeats it.



-- 
Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!



From tom at electricdruid.net  Wed Apr  3 22:57:02 2013
From: tom at electricdruid.net (Tom Wiltshire)
Date: Wed, 3 Apr 2013 21:57:02 +0100
Subject: [sdiy] Output buffer question
Message-ID: <A76BE9F0-9F5C-4D7F-AD9E-3D648613ABD8@electricdruid.net>

Hi All,

I'm working on a glide circuit, and the first attempt used a simple voltage follower as a buffer. This didn't work that well, because the current limiting resistor messes things up (thumbs down).

The second attempt (thumbs up) puts the resistor inside the feedback loop. This works much better - in fact, it works. However, most of the buffers I've seen in this style use a feedback resistor, a stability capacitor, and are inverting. So it's had a few "modifications".

http://www.electricdruid.net/ThumbsUp.GIF

What I'd like to know is whether there are any problems with this. If I can't modify the standard CV output buffer like this, I'd like to learn why not.

Thanks!

Tom



From neil.johnson97 at ntlworld.com  Wed Apr  3 23:33:25 2013
From: neil.johnson97 at ntlworld.com (Neil Johnson)
Date: Wed, 03 Apr 2013 22:33:25 +0100
Subject: [sdiy] Output buffer question
In-Reply-To: <A76BE9F0-9F5C-4D7F-AD9E-3D648613ABD8@electricdruid.net>
References: <A76BE9F0-9F5C-4D7F-AD9E-3D648613ABD8@electricdruid.net>
Message-ID: <515CA025.7040308@ntlworld.com>

Hi Tom,

> I'm working on a glide circuit, and the first attempt used a simple
> voltage follower as a buffer. This didn't work that well, because
> the current limiting resistor messes things up (thumbs down).

Under what circumstances does it "mess up"?  If you only have a DVM on 
the output (i.e., practically zero load) then I would suggest the 
construction has messed up, so check wiring.

> The second attempt (thumbs up) puts the resistor inside the feedback
> loop. This works much better - in fact, it works. However, most of
> the buffers I've seen in this style use a feedback resistor, a
> stability capacitor, and are inverting. So it's had a few
> "modifications".
>
> http://www.electricdruid.net/ThumbsUp.GIF

You can do a non-inverting buffer in the same way, with a capacitor 
directly across the output-to-neg.input, then the main feedback path 
with a suitable resistor.

> What I'd like to know is whether there are any problems with this.
> If I can't modify the standard CV output buffer like this, I'd like
> to learn why not.

To understand what can go wrong you first need to draw out the complete 
circuit.  Your diagram is only half the story.  You need to add the 
load, especially the parasitic capacitance.  Only then will it be 
obvious *why* it can go wrong and oscillate wildly.

Cheers
Neil
-- 
Modules and more :: www.cesyg.com
Homepage :: www.njohnson.co.uk ::


From rburnett at richieburnett.co.uk  Fri Apr  5 18:36:07 2013
From: rburnett at richieburnett.co.uk (Richie Burnett)
Date: Fri, 5 Apr 2013 17:36:07 +0100
Subject: [sdiy] Fast envelope follower circuit needed..
Message-ID: <FA03D7E680D4462E8D98F405926EB508@homepc002>

Hi all,

A few weeks back I posted a response here recommending the OP to investigate 
using the Hilbert Transform to extract the envelope from a signal.  This was 
because I've had good results using this in some specific DSP products. 
However, Bernie Hutchins initiated some interesting off-list discussions 
about this, and he has pointed out to me several example situations where 
this method does not yield the envelope that a synth enthusiast might 
intuitively expect to see!

I don't want to go into this in too much depth because the thread didn't get 
much response anyway, and Bernie has looked into this in far more depth than 
I did, some years previously.  He has kindly agreed to me including a link 
to his thorough analysis here:

http://electronotes.netfirms.com/AN355.pdf

My appologies for any confusion caused.

Best regards,

-Richie, 



From cheater00 at gmail.com  Sat Apr  6 05:21:37 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Sat, 6 Apr 2013 05:21:37 +0200
Subject: [sdiy] Fast envelope follower circuit needed..
In-Reply-To: <FA03D7E680D4462E8D98F405926EB508@homepc002>
References: <FA03D7E680D4462E8D98F405926EB508@homepc002>
Message-ID: <CA+9GZUg-ktCx1QjDTu8U6-xYaiW8zKEfqBbCg5iQCR04-ymSRQ@mail.gmail.com>

For one I'd love to see the conversation ... feel free to forward to
the list if Bernie is OK with it!

Cheers,
D.

On Fri, Apr 5, 2013 at 6:36 PM, Richie Burnett
<rburnett at richieburnett.co.uk> wrote:
> Hi all,
>
> A few weeks back I posted a response here recommending the OP to investigate
> using the Hilbert Transform to extract the envelope from a signal.  This was
> because I've had good results using this in some specific DSP products.
> However, Bernie Hutchins initiated some interesting off-list discussions
> about this, and he has pointed out to me several example situations where
> this method does not yield the envelope that a synth enthusiast might
> intuitively expect to see!
>
> I don't want to go into this in too much depth because the thread didn't get
> much response anyway, and Bernie has looked into this in far more depth than
> I did, some years previously.  He has kindly agreed to me including a link
> to his thorough analysis here:
>
> http://electronotes.netfirms.com/AN355.pdf
>
> My appologies for any confusion caused.
>
> Best regards,
>
> -Richie,
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From cheater00 at gmail.com  Sat Apr  6 05:35:01 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Sat, 6 Apr 2013 05:35:01 +0200
Subject: [sdiy] Fast envelope follower circuit needed..
In-Reply-To: <FA03D7E680D4462E8D98F405926EB508@homepc002>
References: <FA03D7E680D4462E8D98F405926EB508@homepc002>
Message-ID: <CA+9GZUgEfsoayMF97=nktUYfj_-5wxXGh7qHR66Z+78w4dwORw@mail.gmail.com>

On Fri, Apr 5, 2013 at 6:36 PM, Richie Burnett
<rburnett at richieburnett.co.uk> wrote:
> Hi all,
>
> A few weeks back I posted a response here recommending the OP to investigate
> using the Hilbert Transform to extract the envelope from a signal.  This was
> because I've had good results using this in some specific DSP products.
> However, Bernie Hutchins initiated some interesting off-list discussions
> about this, and he has pointed out to me several example situations where
> this method does not yield the envelope that a synth enthusiast might
> intuitively expect to see!
>
> I don't want to go into this in too much depth because the thread didn't get
> much response anyway, and Bernie has looked into this in far more depth than
> I did, some years previously.  He has kindly agreed to me including a link
> to his thorough analysis here:
>
> http://electronotes.netfirms.com/AN355.pdf

This electronote is super interesting. Summing it up: you don't want
to use the Hilbert transform for composite sounds; in any case the
low-pass filter approach is better or just as good.


From robkam at ymail.com  Sat Apr  6 12:29:21 2013
From: robkam at ymail.com (Rob Kam)
Date: Sat, 6 Apr 2013 11:29:21 +0100
Subject: [sdiy] SDIY wiki
References: <FA03D7E680D4462E8D98F405926EB508@homepc002>
	<CA+9GZUgEfsoayMF97=nktUYfj_-5wxXGh7qHR66Z+78w4dwORw@mail.gmail.com>
Message-ID: <ABD350B701B64A68BDD84E571D143E89@kutair>

Hello everyone,

I've recently started learning about synth DIY. I already have a fair 
knowledge of electronics. I couldn't find a Q&A site already on the web that 
suited me. So I set up a wiki to organise my ideas and to have answers on. 
Only I'm not much of a writer.

Now I'm spending more time getting the wiki good enough to be useful, than 
doing breadboarding/soldering. The wiki still needs a lot of content adding. 
At the moment, for sharing schematics I'm linking off-site to wherever the 
schematic might be posted.

You're all welcome to use it as well. It's at http://www.sdiy.info or just 
sdiy.info

Rob





From cheater00 at gmail.com  Sat Apr  6 12:34:59 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Sat, 6 Apr 2013 12:34:59 +0200
Subject: [sdiy] SDIY wiki
In-Reply-To: <ABD350B701B64A68BDD84E571D143E89@kutair>
References: <FA03D7E680D4462E8D98F405926EB508@homepc002>
	<CA+9GZUgEfsoayMF97=nktUYfj_-5wxXGh7qHR66Z+78w4dwORw@mail.gmail.com>
	<ABD350B701B64A68BDD84E571D143E89@kutair>
Message-ID: <CA+9GZUi_RXv1AxkRyTAi-5tgxYiH8thL9y4mD3o5jJzCyVArKg@mail.gmail.com>

Really cool! Thanks!

Cheers,
D.

On Sat, Apr 6, 2013 at 12:29 PM, Rob Kam <robkam at ymail.com> wrote:
> Hello everyone,
>
> I've recently started learning about synth DIY. I already have a fair
> knowledge of electronics. I couldn't find a Q&A site already on the web that
> suited me. So I set up a wiki to organise my ideas and to have answers on.
> Only I'm not much of a writer.
>
> Now I'm spending more time getting the wiki good enough to be useful, than
> doing breadboarding/soldering. The wiki still needs a lot of content adding.
> At the moment, for sharing schematics I'm linking off-site to wherever the
> schematic might be posted.
>
> You're all welcome to use it as well. It's at http://www.sdiy.info or just
> sdiy.info
>
> Rob
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From lightburnx at yahoo.com  Mon Apr  8 00:08:01 2013
From: lightburnx at yahoo.com (Kyle Stephens)
Date: Sun, 7 Apr 2013 15:08:01 -0700 (PDT)
Subject: [sdiy] FS: 2x MOTM Prototype PCBs & 1x MOTM-830 PCB
Message-ID: <1365372481.36625.YahooMailClassic@web126002.mail.ne1.yahoo.com>

Though I'd address the tribe before going to fleaBay.

I have 2 never used MOTM proto PCBs, and alas no use for them.

Also, 1 unsoldered MOTM-830 Dual-Mode Mixer PCB, still in the bag. Think I got this and the protos from one of Paul's moving goodie boxes.

Prices? Make me an offer.

Pictures here:

http://i10.photobucket.com/albums/a102/erschlagener/IMAG1134_zpsddcfccf5.jpg
http://i10.photobucket.com/albums/a102/erschlagener/IMAG1135_zps45815d00.jpg
http://i10.photobucket.com/albums/a102/erschlagener/IMAG1136_zps2115fd87.jpg
http://i10.photobucket.com/albums/a102/erschlagener/IMAG1137_zpsf13d2556.jpg

And more if you like.

Will ship worldwide, PayPal only, you pay S&H (will combo of course), or can do a local pickup with cash in the SF Bay Area. No trades, sorry :(


_Kyle


From lightburnx at yahoo.com  Mon Apr  8 01:37:43 2013
From: lightburnx at yahoo.com (Kyle Stephens)
Date: Sun, 7 Apr 2013 16:37:43 -0700 (PDT)
Subject: [sdiy] FS: Stuffed Gristlizer PCB w/out Housing
Message-ID: <1365377863.98665.YahooMailClassic@web126004.mail.ne1.yahoo.com>

More spring cleaning...

Throbbing Gristle "Gristlizer" Effect Pedal Thinger Audio Messer Upper

It's a combo VCA/VFC (one at a time or both), with CV bias and multiwave LFO.

Demo example: http://www.youtube.com/watch?v=37zXCmsGZFk

I got this a long time ago from a list member iirc, hooked it up with jumpers a few times (ie: it *does* work, 100%), but never got around to putting it inside anything.

This can be modified to work with +/- Whatever-Voltage-You-Run-On (as is, it takes a 9V and uses a charge pump for a virtual ground I think?).

There's some documentation to be had out there, albeit it takes a bit of looking. As is, the ins and outs are pretty clearly labeled on the PCB.

Just needs a loving/destroying home (this is TG we're talking about after all), and well, a box/panel/etc.

Pictures:

http://s10.photobucket.com/user/erschlagener/media/IMAG1142_zpsdbf22e77.jpg.html
http://s10.photobucket.com/user/erschlagener/media/IMAG1139_zps426e6613.jpg.html
http://s10.photobucket.com/user/erschlagener/media/IMAG1138_zps4840c0cb.jpg.html
http://s10.photobucket.com/user/erschlagener/media/IMAG1143_zps24c5a634.jpg.html

Make me an offer kids.

Will ship, will take cash for local SF Bay Area cats, or dogs as the case may be.


_Kyle


From james.n.murray at gmail.com  Mon Apr  8 02:46:50 2013
From: james.n.murray at gmail.com (James)
Date: Sun, 7 Apr 2013 19:46:50 -0500
Subject: [sdiy] FS: Stuffed Gristlizer PCB w/out Housing
In-Reply-To: <1365377863.98665.YahooMailClassic@web126004.mail.ne1.yahoo.com>
References: <1365377863.98665.YahooMailClassic@web126004.mail.ne1.yahoo.com>
Message-ID: <A6119F5E-689E-4535-A0D8-9128C1FE6CBA@gmail.com>

Hey Kyle, 

I'd definitely be interested in this but really don't know what a fair price would be for it and don't want to low ball you. 

James

Sent from my iPhone

On Apr 7, 2013, at 6:37 PM, Kyle Stephens <lightburnx at yahoo.com> wrote:

> More spring cleaning...
> 
> Throbbing Gristle "Gristlizer" Effect Pedal Thinger Audio Messer Upper
> 
> It's a combo VCA/VFC (one at a time or both), with CV bias and multiwave LFO.
> 
> Demo example: http://www.youtube.com/watch?v=37zXCmsGZFk
> 
> I got this a long time ago from a list member iirc, hooked it up with jumpers a few times (ie: it *does* work, 100%), but never got around to putting it inside anything.
> 
> This can be modified to work with +/- Whatever-Voltage-You-Run-On (as is, it takes a 9V and uses a charge pump for a virtual ground I think?).
> 
> There's some documentation to be had out there, albeit it takes a bit of looking. As is, the ins and outs are pretty clearly labeled on the PCB.
> 
> Just needs a loving/destroying home (this is TG we're talking about after all), and well, a box/panel/etc.
> 
> Pictures:
> 
> http://s10.photobucket.com/user/erschlagener/media/IMAG1142_zpsdbf22e77.jpg.html
> http://s10.photobucket.com/user/erschlagener/media/IMAG1139_zps426e6613.jpg.html
> http://s10.photobucket.com/user/erschlagener/media/IMAG1138_zps4840c0cb.jpg.html
> http://s10.photobucket.com/user/erschlagener/media/IMAG1143_zps24c5a634.jpg.html
> 
> Make me an offer kids.
> 
> Will ship, will take cash for local SF Bay Area cats, or dogs as the case may be.
> 
> 
> _Kyle
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From djthomaswhite at yahoo.com  Mon Apr  8 07:08:59 2013
From: djthomaswhite at yahoo.com (Thomas White)
Date: Sun, 7 Apr 2013 22:08:59 -0700
Subject: [sdiy] Test
Message-ID: <D7A5452A-1C5F-4CED-845C-20591A73FC02@yahoo.com>



Thomas White
Natural Rhythm Music
www.naturalrhythmmusic.com


From lightburnx at yahoo.com  Tue Apr  9 07:55:25 2013
From: lightburnx at yahoo.com (Kyle Stephens)
Date: Mon, 8 Apr 2013 22:55:25 -0700 (PDT)
Subject: [sdiy] FS: Devi Ever Fuzz Pedals
Message-ID: <1365486925.32551.YahooMailClassic@web126003.mail.ne1.yahoo.com>

These have broader appeal outside the synth werld, hence the eBay. But it's equal footing for all to take a crack at it.

Devi Ever Ruby Fuzz (w/Boost Mod):

http://www.ebay.com/itm/111048288762?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

I am the originator and executor of this mod, drilled and soldered it myself. "Boost" is just the best word I could think for it, doesn't super raise the volume, and doesn't flip the noise on its head either. Some nice versatility for just a single switch.


Devi Ever Circuit Breaker (w/CV in!)

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=111048311809

Weird little (well, it's the size of a Muff) box. Switches do strange things, sometimes nothing, all in the turns of the knobs and whatever you're pouring into it. Upon turning in on, and looking within, a red glow emanated from within - part of the built in optocompressor inside. I don't think it'll add squash, but it ought keep the feedback from howling (and not in a good way) out of control. I think. Just didn't get much use out of this because it takes some care. Not made any more either btw.

As said, this effect takes CV in. I imagine it affects the "Texture" setting, but of this I am unsure. Then again I'm unsure of most things on this stomp, it's a thing of wonder and mystery, and can be yours if the price is right.


Questions etc., email it here or eBay message me, operators are standing by.


_Kyle


From stewpye at optusnet.com.au  Tue Apr  9 08:54:39 2013
From: stewpye at optusnet.com.au (Stewart Pye)
Date: Tue, 09 Apr 2013 16:54:39 +1000
Subject: [sdiy] Oberheim OB-Xa Servicing
Message-ID: <5163BB2F.6060907@optusnet.com.au>

Howdy,

I'm servicing a REV3 OB-Xa.
I've gotten to the upper and lower control board calibration section in the REV 3 service manual and am trying to do the first step:

DAC OFFSET ADJUSTMENT
Press the UNISON switch . Press low C (C0). Measure the voltage at pin 7 of IC#64 and adjust trimmer T6 (near IC#35) for 0.000V ?2mV.

I can't find IC64 on either of the control boards. From the schematic in the service manual U64 is part of a sample and hold circuit which also consists of a CA3080, and are fed by a multiplexer U47. I can find U47 on this board but there are only quad op amps and some capacitors nearby, and no CA3080. Is there a later version of the service manual to cover this PCB?

Serial number on this unit is 823706.

Regards,
Stewart.



From fanwander at mnet-online.de  Tue Apr  9 10:25:54 2013
From: fanwander at mnet-online.de (Florian Anwander)
Date: Tue, 09 Apr 2013 10:25:54 +0200
Subject: [sdiy] Slide potentiometer wanted
Message-ID: <5163D092.3060809@mnet-online.de>

Hello

Can anyone of recognize the brand of this slide potentiometer?
http://fa.utfs.org/diy/minibrute/images/IMG_0094.jpg
http://fa.utfs.org/diy/minibrute/images/IMG_0096.jpg
http://fa.utfs.org/diy/minibrute/images/IMG_0097.jpg

It is the envelope decay slider from a Arturia minibrute and I'd like to 
replace it with a slider with log taper.

Florian
-- 
http://fa.utfs.org/


From tokalo at videotron.ca  Tue Apr  9 10:49:00 2013
From: tokalo at videotron.ca (Tony Kalomiris)
Date: Tue, 09 Apr 2013 04:49:00 -0400
Subject: [sdiy] Oberheim OB-Xa Servicing
In-Reply-To: <5163BB2F.6060907@optusnet.com.au>
References: <5163BB2F.6060907@optusnet.com.au>
Message-ID: <FE82FDF9-5221-472B-BD0E-05668267F07F@videotron.ca>

Hi Stewart,

I took a look at the service manual and indeed there is no IC64 (TL082) on the component overlay diagram but it's there on the schematic of the lower control board.

You can trace this KCV1 to the Voice 1, section Motherboard 'B13' 'C1'.

Tony K

On 2013-04-09, at 2:54 AM, Stewart Pye wrote:

> Howdy,
> 
> I'm servicing a REV3 OB-Xa.
> I've gotten to the upper and lower control board calibration section in the REV 3 service manual and am trying to do the first step:
> 
> DAC OFFSET ADJUSTMENT
> Press the UNISON switch . Press low C (C0). Measure the voltage at pin 7 of IC#64 and adjust trimmer T6 (near IC#35) for 0.000V ?2mV.
> 
> I can't find IC64 on either of the control boards. From the schematic in the service manual U64 is part of a sample and hold circuit which also consists of a CA3080, and are fed by a multiplexer U47. I can find U47 on this board but there are only quad op amps and some capacitors nearby, and no CA3080. Is there a later version of the service manual to cover this PCB?
> 
> Serial number on this unit is 823706.
> 
> Regards,
> Stewart.
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From jarno.verhoeven at ziggo.nl  Tue Apr  9 12:04:58 2013
From: jarno.verhoeven at ziggo.nl (J. Verhoeven)
Date: Tue, 09 Apr 2013 12:04:58 +0200
Subject: [sdiy] Slide potentiometer wanted
In-Reply-To: <77c0b3bf123d27.5163e7b8@ziggo.nl>
References: <5163D092.3060809@mnet-online.de>
	<7690d43d121d60.5163e73f@ziggo.nl> <77c0b3bf123d27.5163e7b8@ziggo.nl>
Message-ID: <77c0bf8712642f.516403ea@ziggo.nl>

Hello Florian,

Have you tried e-mailing Yves Usson?
Alternatively, if the slide pot is still ok, you could try to add a law faking resistor.

Jarno.


On 04/09/13, Florian Anwander <fanwander at mnet-online.de> wrote:
> Hello
> 
> Can anyone of recognize the brand of this slide potentiometer?
> http://fa.utfs.org/diy/minibrute/images/IMG_0094.jpg
> http://fa.utfs.org/diy/minibrute/images/IMG_0096.jpg
> http://fa.utfs.org/diy/minibrute/images/IMG_0097.jpg
> 
> It is the envelope decay slider from a Arturia minibrute and I'd like to replace it with a slider with log taper.
> 
> Florian
> -- 
> http://fa.utfs.org/
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
>


From stewpye at optusnet.com.au  Tue Apr  9 12:57:26 2013
From: stewpye at optusnet.com.au (Stewart Pye)
Date: Tue, 09 Apr 2013 20:57:26 +1000
Subject: [sdiy] Oberheim OB-Xa Servicing
In-Reply-To: <FE82FDF9-5221-472B-BD0E-05668267F07F@videotron.ca>
References: <5163BB2F.6060907@optusnet.com.au>
	<FE82FDF9-5221-472B-BD0E-05668267F07F@videotron.ca>
Message-ID: <5163F416.1010401@optusnet.com.au>

Hi Tony,

Thanks for the reply. I had another look at the service manual and 
indeed the lower control board overlay is the same as the board in the 
unit I have. As you suggest, I should be able to just measure the keycv 
on the voice board.

The next step in the procedure is:
DAC FULL SCALE ADJUSTMENT
Press High C (C5) Measure the voltage at pin 9 of IC#64 and adjust 
trimmer T9 for 5.000V.

I assume "pin 9" is a typo, as on the schematic IC64 is a TL082 so there 
is no pin 9. It probably should be pin 7 again, so I'd just be measuring 
the keycv again and it should be 5 volts higher than when C0 was 
pressed. That makes more sense...

Regards,
Stewart.



On 4/9/2013 6:49 PM, Tony Kalomiris wrote:
> Hi Stewart,
>
> I took a look at the service manual and indeed there is no IC64 (TL082) on the component overlay diagram but it's there on the schematic of the lower control board.
>
> You can trace this KCV1 to the Voice 1, section Motherboard 'B13' 'C1'.
>
> Tony K
>
> On 2013-04-09, at 2:54 AM, Stewart Pye wrote:
>
>> Howdy,
>>
>> I'm servicing a REV3 OB-Xa.
>> I've gotten to the upper and lower control board calibration section in the REV 3 service manual and am trying to do the first step:
>>
>> DAC OFFSET ADJUSTMENT
>> Press the UNISON switch . Press low C (C0). Measure the voltage at pin 7 of IC#64 and adjust trimmer T6 (near IC#35) for 0.000V ?2mV.
>>
>> I can't find IC64 on either of the control boards. From the schematic in the service manual U64 is part of a sample and hold circuit which also consists of a CA3080, and are fed by a multiplexer U47. I can find U47 on this board but there are only quad op amps and some capacitors nearby, and no CA3080. Is there a later version of the service manual to cover this PCB?
>>
>> Serial number on this unit is 823706.
>>
>> Regards,
>> Stewart.
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>



From fanwander at mnet-online.de  Tue Apr  9 13:06:39 2013
From: fanwander at mnet-online.de (Florian Anwander)
Date: Tue, 09 Apr 2013 13:06:39 +0200
Subject: [sdiy] Slide potentiometer wanted
In-Reply-To: <77c0bf8712642f.516403ea@ziggo.nl>
References: <5163D092.3060809@mnet-online.de>
	<7690d43d121d60.5163e73f@ziggo.nl>
	<77c0b3bf123d27.5163e7b8@ziggo.nl>
	<77c0bf8712642f.516403ea@ziggo.nl>
Message-ID: <5163F63F.7070300@mnet-online.de>

Hello Jarno

Am 09.04.2013 12:04, schrieb J. Verhoeven:
> Have you tried e-mailing Yves Usson?
not yet. I am not sure, whether he is involved in the final 
construction. The yusynth envelopes always use 1M potentiometers, so I 
assume the circuit in the Minibrute is not from him.


> Alternatively, if the slide pot is still ok, you could try to add a law faking resistor.
That of course...

But not knowing the complete circuitry (it seems to be a multilayer PCB, 
so tracing could become a bit complicated), I'd like to avoid a change 
in the total dimension of the potentiometer.

Florian


From nvawter at media.mit.edu  Tue Apr  9 19:12:28 2013
From: nvawter at media.mit.edu (nvawter at media.mit.edu)
Date: Tue, 09 Apr 2013 13:12:28 -0400
Subject: [sdiy] Slide potentiometer wanted
In-Reply-To: <77c0bf8712642f.516403ea@ziggo.nl>
References: <5163D092.3060809@mnet-online.de>
	<7690d43d121d60.5163e73f@ziggo.nl> <77c0b3bf123d27.5163e7b8@ziggo.nl>
	<77c0bf8712642f.516403ea@ziggo.nl>
Message-ID: <20130409131228.50343ohqfk2m5p18@webmail.media.mit.edu>

tee hee


http://knobfeel.tumblr.com/


reviews of equipment by the feel of the knobs :)





From nvawter at media.mit.edu  Tue Apr  9 19:20:00 2013
From: nvawter at media.mit.edu (nvawter at media.mit.edu)
Date: Tue, 09 Apr 2013 13:20:00 -0400
Subject: [sdiy] http://reddit.com/r/stm32f4
In-Reply-To: <77c0bf8712642f.516403ea@ziggo.nl>
References: <5163D092.3060809@mnet-online.de>
	<7690d43d121d60.5163e73f@ziggo.nl> <77c0b3bf123d27.5163e7b8@ziggo.nl>
	<77c0bf8712642f.516403ea@ziggo.nl>
Message-ID: <20130409132000.102857tz51okq7r4@webmail.media.mit.edu>



Hey everyone!

especially those with an interest in the stm32f4 processor for  
music/audio/synth/effects...

I created a "subreddit" recently for "questions, how-tos, sharing and  
showing off" of projects based on the stm32f4.

It's at:
http://www.reddit.com/r/stm32f4/

I know some people here have been working with this awesome CPU, so I  
encourage you to post your projects to encourage everyone, get  
recognition and get feedback (and possibly customers?!)

If you're not familiar with reddit, just go to the url and click on the links.
If you make a lightweight account, you can leave comments and "upvote"  
projects.

-Noah!




From juzowen at gmail.com  Tue Apr  9 22:00:33 2013
From: juzowen at gmail.com (Justin Owen)
Date: Tue, 9 Apr 2013 21:00:33 +0100
Subject: [sdiy] Clipping/Limiting output optimization
Message-ID: <51647363.e958b40a.70fc.ffffefef@mx.google.com>

Hey all,

I'm trying to take the 2x op-amp output shown in the top half this schem:

http://www.sdiy.org/juz/non_inv_clip_01.pdf

and turn it into a 1x op-amp version.

Input is from in-circuit - most likely from another op-amp and output is to the outside world via 1K impedance.

Any problems with the second version, anyone like to offer a better version?

Thanks,

Justin





From don at till.com  Tue Apr  9 22:31:12 2013
From: don at till.com (Donald Tillman)
Date: Tue, 9 Apr 2013 13:31:12 -0700
Subject: [sdiy] Clipping/Limiting output optimization
In-Reply-To: <51647363.e958b40a.70fc.ffffefef@mx.google.com>
References: <51647363.e958b40a.70fc.ffffefef@mx.google.com>
Message-ID: <CFCE98EB-6F6D-4BEF-AEF5-72C0C5B73DA9@till.com>

On Apr 9, 2013, at 1:00 PM, Justin Owen <juzowen at gmail.com> wrote:

> I'm trying to take the 2x op-amp output shown in the top half this schem:
> 
> http://www.sdiy.org/juz/non_inv_clip_01.pdf
> 
> and turn it into a 1x op-amp version.  Input is from in-circuit - most likely from another op-amp and output is to the outside world via 1K impedance.
> 
> Any problems with the second version, anyone like to offer a better version?


Off the top of my head...

The bottom circuit needs a resistor between the opamp and the diodes.

The bottom circuit really wants the zeners in series.

(With the fixes above) the output impedance of the bottom circuit will be changing over the course of the waveform, which might be considered antisocial behavior playing with other signals.

The clipping curves will be different.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com






From nvawter at media.mit.edu  Wed Apr 10 00:05:05 2013
From: nvawter at media.mit.edu (nvawter at media.mit.edu)
Date: Tue, 09 Apr 2013 18:05:05 -0400
Subject: [sdiy] http://reddit.com/r/stm32f4
In-Reply-To: <57B7D8FB-F6B2-47FB-87D0-D435E9C0FADF@earthlink.net>
References: <20130409132000.102857tz51okq7r4@webmail.media.mit.edu>
	<FFED24C2-4ACB-4903-9EC4-3BE072DD7A51@earthlink.net>
	<57B7D8FB-F6B2-47FB-87D0-D435E9C0FADF@earthlink.net>
Message-ID: <20130409180505.423019rip69qzqtt@webmail.media.mit.edu>


Thank you for the good question!

A little while back (a few months), I made this spreadsheet which  
compares the M4 dev boards:
https://docs.google.com/spreadsheet/ccc?key=0Am7wuPBwl_tbdGtXR1hpMzRCNzJpVWNYTE5hanowb0E#gid=0

One takeaway is that the TI and Kinetis versions of the chips had  
lower maximum clock speeds than the ST versions.

Also the TI versions seem to be non-stock at DigiKey.  Not the end of  
the world, but a little harder to obtain.

Also, it looks like Maple Native II is still vaporware... fingers crossed.

Also, NXP has the LPC43xx series which can clock to 208 MHz(!) and  
seems to have dual-core(!), but I can't tell if it has the  
floating-point unit inside.

My current favorite dev board is the FEZ Cerb40, but it shamefully  
doesn't breakout 4 of the analog signals.  I've started designing my  
own similar PCB that includes all analog inputs broken out...   but  
I'm having too much fun making music with the Cerb40 in the meantime :)

If anyone has any updates or corrections to my spreadsheet, please let  
me know, I'd be happy to keep it current.  The stm32f4 is imho the  
best thing to come along in a long time!



Quoting Terry Shultz <thx1138 at earthlink.net>:

> Just a quick check, does TI, NXP, renesas, Freescale or any others  
> cortex m4 devices have any plus or minuses in comparison?
>
> I have not seen any real comparison charts available.
>
> Perhaps some could let us know as price, speed, package, power  
> consumption are all very  similar as are tools.
>
> I should think 90 nm geometry is current for all.
>
> Regards
>
> Terry
>
>
>
> Sent from my iPad
>
> On Apr 9, 2013, at 12:12 PM, Thx1138 <thx1138 at earthlink.net> wrote:
>
>>
>>
>> Sent from my iPhone
>>
>> Begin forwarded message:
>>
>>> From: nvawter at media.mit.edu
>>> Date: April 9, 2013, 10:20:00 AM PDT
>>> To: synth-diy at dropmix.xs4all.nl
>>> Subject: [sdiy] http://reddit.com/r/stm32f4
>>>
>>>
>>> Hey everyone!
>>>
>>> especially those with an interest in the stm32f4 processor for  
>>> music/audio/synth/effects...
>>>
>>> I created a "subreddit" recently for "questions, how-tos, sharing  
>>> and showing off" of projects based on the stm32f4.
>>>
>>> It's at:
>>> http://www.reddit.com/r/stm32f4/
>>>
>>> I know some people here have been working with this awesome CPU,  
>>> so I encourage you to post your projects to encourage everyone,  
>>> get recognition and get feedback (and possibly customers?!)
>>>
>>> If you're not familiar with reddit, just go to the url and click  
>>> on the links.
>>> If you make a lightweight account, you can leave comments and  
>>> "upvote" projects.
>>>
>>> -Noah!
>>>
>>>
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>




From rgrmt9 at gmail.com  Wed Apr 10 08:09:01 2013
From: rgrmt9 at gmail.com (Roger Mote)
Date: Tue, 9 Apr 2013 23:09:01 -0700
Subject: [sdiy] Slide potentiometer wanted
In-Reply-To: <5163D092.3060809@mnet-online.de>
References: <5163D092.3060809@mnet-online.de>
Message-ID: <CAGoJ6Q7cMaALWonLOZU5iQkB_DTv9wnYozztAP8TVoP8An9GuQ@mail.gmail.com>

Hi Florian,

Looks like an Alpha. 30mm travel. Mouser should have a replacement.
Song Huei SL3015 is similar and fits the same PCB footprint.

Cheers, Roger

On Tue, Apr 9, 2013 at 1:25 AM, Florian Anwander
<fanwander at mnet-online.de> wrote:
> Hello
>
> Can anyone of recognize the brand of this slide potentiometer?
> http://fa.utfs.org/diy/minibrute/images/IMG_0094.jpg
> http://fa.utfs.org/diy/minibrute/images/IMG_0096.jpg
> http://fa.utfs.org/diy/minibrute/images/IMG_0097.jpg
>
> It is the envelope decay slider from a Arturia minibrute and I'd like to
> replace it with a slider with log taper.
>
> Florian
> --
> http://fa.utfs.org/
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From robkam at ymail.com  Thu Apr 11 11:58:21 2013
From: robkam at ymail.com (Rob Kam)
Date: Thu, 11 Apr 2013 10:58:21 +0100
Subject: [sdiy] SDIY wiki
Message-ID: <D48AC8B557AA424DAA0CFD0EE987ED54@kutair>

Hello everyone,

I've recently started learning about synth DIY. I already have a fair 
knowledge of electronics. I couldn't find a Q&A site already on the web that 
suited me. So I set up a wiki to organise my ideas and to have answers on. 
Only I'm not much of a writer.

Now I'm spending more time getting the wiki good enough to be useful, than 
doing breadboarding/soldering. The wiki still needs a lot of content adding. 
At the moment, for sharing schematics I'm linking off-site to wherever the 
schematic might be posted.

You're all welcome to use it as well. It's at http://www.sdiy.info or just 
sdiy.info

Rob 



From nvawter at media.mit.edu  Thu Apr 11 16:39:15 2013
From: nvawter at media.mit.edu (nvawter at media.mit.edu)
Date: Thu, 11 Apr 2013 10:39:15 -0400
Subject: [sdiy] SDIY wiki
In-Reply-To: <D48AC8B557AA424DAA0CFD0EE987ED54@kutair>
References: <D48AC8B557AA424DAA0CFD0EE987ED54@kutair>
Message-ID: <20130411103915.18251s5o4izf68er@webmail.media.mit.edu>


brilliant and great initiative!

I've worked on a dozen or so wikis and even written a book via wiki  
(http://10print.org).

Would you please enable the "WYSIWIG" extension?  I've found it  
greatly increases the quality of the posting because it's easier to  
edit that way.  I've found the problem with coded wikipedia markup is  
that people's state of mind literally switches out when they press  
"Edit" and all of the visible text disappears then gets replaced with  
the fixed-width coded version of their text.  Is as if the mind is  
suddenly looking at a different page in a different book and it's hard  
to remember what the updates you wanted to make are.

As MediaWiki puts it:
"For the more technically inclined, wiki markup is a simple way of  
formatting a wiki page. However, many would-be users of MediaWiki are  
put off by what looks to them ? rightly ? to be code of any sort.  
These users are adjusted to publishing and editing in a more visually  
straightforward WYSIWYG (What You See Is What You Get) environment."

Also, I tried to post some links to other communities, but I got a  
message saying:
"This action has been automatically identified as harmful, and  
therefore disallowed. If you believe your edit was constructive,  
please inform an administrator of what you were trying to do. A brief  
description of the abuse rule which your action matched is: Spamming"

Ohter than those issues, I'm pumped to see the new wiki!  I really  
like the logo you made of the soldering iron creating notes!  It's  
awesome and something I'd like to be part of!

-Noah



Quoting Rob Kam <robkam at ymail.com>:

> Hello everyone,
>
> I've recently started learning about synth DIY. I already have a fair
> knowledge of electronics. I couldn't find a Q&A site already on the web that
> suited me. So I set up a wiki to organise my ideas and to have answers on.
> Only I'm not much of a writer.
>
> Now I'm spending more time getting the wiki good enough to be useful, than
> doing breadboarding/soldering. The wiki still needs a lot of content adding.
> At the moment, for sharing schematics I'm linking off-site to wherever the
> schematic might be posted.
>
> You're all welcome to use it as well. It's at http://www.sdiy.info or just
> sdiy.info
>
> Rob
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>



From cheater00 at gmail.com  Thu Apr 11 18:40:30 2013
From: cheater00 at gmail.com (cheater cheater)
Date: Thu, 11 Apr 2013 18:40:30 +0200
Subject: [sdiy] SDIY wiki
In-Reply-To: <20130411103915.18251s5o4izf68er@webmail.media.mit.edu>
References: <D48AC8B557AA424DAA0CFD0EE987ED54@kutair>
	<20130411103915.18251s5o4izf68er@webmail.media.mit.edu>
Message-ID: <CA+9GZUgi3jZ1Bwz4qSE26R3jdNEYOuYAuoOXX8Zc0QEef5_sUA@mail.gmail.com>

On Thu, Apr 11, 2013 at 4:39 PM,  <nvawter at media.mit.edu> wrote:
> Would you please enable the "WYSIWIG" extension?  I've found it greatly
> increases the quality of the posting because it's easier to edit that way.
> I've found the problem with coded wikipedia markup is that people's state of
> mind literally switches out when they press "Edit" and all of the visible
> text disappears then gets replaced with the fixed-width coded version of
> their text.  Is as if the mind is suddenly looking at a different page in a
> different book and it's hard to remember what the updates you wanted to make
> are.

people's or yours?...

Cheers,
D.


> Quoting Rob Kam <robkam at ymail.com>:
>
>> Hello everyone,
>>
>> I've recently started learning about synth DIY. I already have a fair
>> knowledge of electronics. I couldn't find a Q&A site already on the web
>> that
>> suited me. So I set up a wiki to organise my ideas and to have answers on.
>> Only I'm not much of a writer.
>>
>> Now I'm spending more time getting the wiki good enough to be useful, than
>> doing breadboarding/soldering. The wiki still needs a lot of content
>> adding.
>> At the moment, for sharing schematics I'm linking off-site to wherever the
>> schematic might be posted.
>>
>> You're all welcome to use it as well. It's at http://www.sdiy.info or just
>> sdiy.info
>>
>> Rob
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From robkam at ymail.com  Thu Apr 11 20:55:00 2013
From: robkam at ymail.com (Rob Kam)
Date: Thu, 11 Apr 2013 19:55:00 +0100 (BST)
Subject: [sdiy] SDIY wiki
In-Reply-To: <20130411103915.18251s5o4izf68er@webmail.media.mit.edu>
References: <D48AC8B557AA424DAA0CFD0EE987ED54@kutair>
	<20130411103915.18251s5o4izf68er@webmail.media.mit.edu>
Message-ID: <1365706500.70374.YahooMailNeo@web172501.mail.ir2.yahoo.com>

Thanks :-)

The configuration is still being worked on - I'll get back to you about extension WYSIWYG. Anything that encourages ease of use has to be a good thing.

Spam is a real problem. I would have preferred to have a new users first few edits moderated, but there doesn't seem to be a way to do this. So there are spam filters. Don't post an external link at first or you'll ?trigger one of the filters.

Rob

From: "nvawter at media.mit.edu" <nvawter at media.mit.edu>
To: Rob Kam <robkam at ymail.com>?
Cc: Synth-diy at dropmix.xs4all.nl?
Sent: Thursday, 11 April 2013, 15:39
Subject: Re: [sdiy] SDIY wiki


brilliant and great initiative!

I've worked on a dozen or so wikis and even written a book via wiki (http://10print.org).

Would you please enable the "WYSIWIG" extension? ?I've found it greatly increases the quality of the posting because it's easier to edit that way. ?I've found the problem with coded wikipedia markup is that people's state of mind literally switches out when they press "Edit" and all of the visible text disappears then gets replaced with the fixed-width coded version of their text. ?Is as if the mind is suddenly looking at a different page in a different book and it's hard to remember what the updates you wanted to make are.

As MediaWiki puts it:
"For the more technically inclined, wiki markup is a simple way of formatting a wiki page. However, many would-be users of MediaWiki are put off by what looks to them ? rightly ? to be code of any sort. These users are adjusted to publishing and editing in a more visually straightforward WYSIWYG (What You See Is What You Get) environment."

Also, I tried to post some links to other communities, but I got a message saying:
"This action has been automatically identified as harmful, and therefore disallowed. If you believe your edit was constructive, please inform an administrator of what you were trying to do. A brief description of the abuse rule which your action matched is: Spamming"

Ohter than those issues, I'm pumped to see the new wiki! ?I really like the logo you made of the soldering iron creating notes! ?It's awesome and something I'd like to be part of!

-Noah



Quoting Rob Kam <robkam at ymail.com>:

> Hello everyone,
>?
> I've recently started learning about synth DIY. I already have a fair
> knowledge of electronics. I couldn't find a Q&A site already on the web that
> suited me. So I set up a wiki to organise my ideas and to have answers on.
> Only I'm not much of a writer.
>?
> Now I'm spending more time getting the wiki good enough to be useful, than
> doing breadboarding/soldering. The wiki still needs a lot of content adding.
> At the moment, for sharing schematics I'm linking off-site to wherever the
> schematic might be posted.
>?
> You're all welcome to use it as well. It's at http://www.sdiy.info or just
> sdiy.info
>?
> Rob
>?
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>?


From robkam at ymail.com  Fri Apr 12 01:59:41 2013
From: robkam at ymail.com (Rob Kam)
Date: Fri, 12 Apr 2013 00:59:41 +0100
Subject: [sdiy] SDIY wiki
References: <D48AC8B557AA424DAA0CFD0EE987ED54@kutair><20130411103915.18251s5o4izf68er@webmail.media.mit.edu>
	<1365706500.70374.YahooMailNeo@web172501.mail.ir2.yahoo.com>
Message-ID: <FC0A3186C62E40348A3BC828347334E2@kutair>

It now has a WYSIWYG editing mode. There are some settings in Preferences > 
Editing > Rich Editor. It can be toggled on and off with the Show 
WikiTextEditor/Show RichTextEditor links above the toolbar.

Rob

----- Original Message ----- 
From: "Rob Kam" <robkam at ymail.com>
To: <nvawter at media.mit.edu>
Cc: <Synth-diy at dropmix.xs4all.nl>
Sent: Thursday, April 11, 2013 7:55 PM
Subject: Re: [sdiy] SDIY wiki


Thanks :-)

The configuration is still being worked on - I'll get back to you about 
extension WYSIWYG. Anything that encourages ease of use has to be a good 
thing.

Spam is a real problem. I would have preferred to have a new users first few 
edits moderated, but there doesn't seem to be a way to do this. So there are 
spam filters. Don't post an external link at first or you'll trigger one of 
the filters.

Rob

From: "nvawter at media.mit.edu" <nvawter at media.mit.edu>
To: Rob Kam <robkam at ymail.com>
Cc: Synth-diy at dropmix.xs4all.nl
Sent: Thursday, 11 April 2013, 15:39
Subject: Re: [sdiy] SDIY wiki


brilliant and great initiative!

I've worked on a dozen or so wikis and even written a book via wiki 
(http://10print.org).

Would you please enable the "WYSIWIG" extension? I've found it greatly 
increases the quality of the posting because it's easier to edit that way. 
I've found the problem with coded wikipedia markup is that people's state of 
mind literally switches out when they press "Edit" and all of the visible 
text disappears then gets replaced with the fixed-width coded version of 
their text. Is as if the mind is suddenly looking at a different page in a 
different book and it's hard to remember what the updates you wanted to make 
are.

As MediaWiki puts it:
"For the more technically inclined, wiki markup is a simple way of 
formatting a wiki page. However, many would-be users of MediaWiki are put 
off by what looks to them ? rightly ? to be code of any sort. These users 
are adjusted to publishing and editing in a more visually straightforward 
WYSIWYG (What You See Is What You Get) environment."

Also, I tried to post some links to other communities, but I got a message 
saying:
"This action has been automatically identified as harmful, and therefore 
disallowed. If you believe your edit was constructive, please inform an 
administrator of what you were trying to do. A brief description of the 
abuse rule which your action matched is: Spamming"

Ohter than those issues, I'm pumped to see the new wiki! I really like the 
logo you made of the soldering iron creating notes! It's awesome and 
something I'd like to be part of!

-Noah



Quoting Rob Kam <robkam at ymail.com>:

> Hello everyone,
>
> I've recently started learning about synth DIY. I already have a fair
> knowledge of electronics. I couldn't find a Q&A site already on the web 
> that
> suited me. So I set up a wiki to organise my ideas and to have answers on.
> Only I'm not much of a writer.
>
> Now I'm spending more time getting the wiki good enough to be useful, than
> doing breadboarding/soldering. The wiki still needs a lot of content 
> adding.
> At the moment, for sharing schematics I'm linking off-site to wherever the
> schematic might be posted.
>
> You're all welcome to use it as well. It's at http://www.sdiy.info or just
> sdiy.info
>
> Rob
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
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From 21pointy at tpg.com.au  Sun Apr 14 02:35:11 2013
From: 21pointy at tpg.com.au (Adam Inglis)
Date: Sun, 14 Apr 2013 10:35:11 +1000
Subject: [sdiy] Smart FSK specs
Message-ID: <59B1EE78-1882-419F-804A-B0526285B06D@tpg.com.au>

I wonder if anyone can point me to some info regarding the specs of  
Smart FSK? There doen't seem much out there that I can find -  
specifically I'm trying to understand how Song Position Pointer info  
is embedded in the pulse stream.

For a few years now I've been using a system in my studio where I  
synthesize regular FSK using a soft synth in Ableton Live, and send  
this audio out on a dedicated channel to the Tape Sync input of my  
hardware midi sequencer (Roland MC50mkII),  locking it to the DAW.
(Alongside this is a second audio track driving an Innerclock Sync  
Lock using a similar principle, thus relieving the DAW of any clock or  
midi duties, resulting in impeccable timing sync. Details are on my  
webpage:
http://www.adambaby.com/studiotech_sync.html    )

Generating regular FSK is simple - its just alternating tones an  
octave apart at 24 PPQN, same resolution as midi and Roland DIN sync.  
The tones frequencies roughly correspond to midi notes D6 and D7.
I'm wondering, and this may be quite naive, if it also possible to  
synthesize "Smart" FSK, so that the hardware could chase a linear  
arrangement started at any point in the song. Of course, the speed of  
the pulses may well push it beyond the capabilities of a midi file  
driving a soft synth.


Any info welcome!
Adam

FYI this guy makes a free FSK plug in
http://www.rv0.be/
but it is just the vanilla FSK. With my approach you can customize  
groove and swing if you care to, as it just a midi file, not sure if  
his can.


From sounddoctorin at imt.net  Sun Apr 14 13:19:28 2013
From: sounddoctorin at imt.net (Bob Weigel)
Date: Sun, 14 Apr 2013 05:19:28 -0600
Subject: [sdiy] HP130C scope issue
Message-ID: <516A90C0.7010508@imt.net>

Gotta love me still using a 1962 HP scope...but..This is so strange.  My 
scope I'm so used to I refuse to ditch it..lol... besides it's full of 
telefunken EC88 tubes.  ... I have had it out of cal for a while and a 
JITTER in the trigger.  I mean you can trigger if you get right on the 
edge but anywhere between it's bouncing around from some 60hz 
modulation.  Oh and I opened it because an electrolytic was 
smelling...found that and replaced it..the final one that has the 250 
and 100V filters to ground on it.  Replaced with an 80uF since I had a 
can NOS in a box.

ANyway the jitter was still there sadly.  But I found with another scope 
that there is signal on the 250V that rises WITH the jitter..(Initially 
there is no perceivable jitter..but after a few minutes it's quite bad.  
Typically seeing three waveforms offset by a few mm when it's in it's 
warmed up mode)

The 250V comes right off a diode from a xformer winding... with a 150uF 
cap between it and the regulator feed for the 100V  (There are two 
transformer windings stacked with a regulator for the 100V between..then 
ground..then another similar circuit for -100V below that)...and 
initially it was more like almost 300V!  And again..no adjustment for 
that.  I probably should have just made a regulator and the issue might 
be gone.

Instead I assume it was the other cap. I replaced the 150 with a 470uF 
.  THE MAGNITUDE dropped..but otherwise it basically went through the 
same routine.  So strange... with the simple nature of the circuit I 
just can't see another contributor.  The waveform is certainly smoother 
now... but it's got a rounded saw wave that's near what it was before 
when it warms up a few minutes!

Then I put in a 10W zener at 33V with a 10Ohm inrush limit to drop the 
voltage down to near spec at 261V.  Now I've got some jitter all the 
time probably from the 10ohm resistor though I thought it probably 
wouldn't introduce enough ripple..I'm too tired to think.  If anyone has 
another idea who's maybe seen this kind of thing in the past.... I can't 
believe I spent that much time on this relic.  I sure must love it 
dearly.  lol

-- 
Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!



From Peter.Ullrich at kapsch.net  Sun Apr 14 18:02:37 2013
From: Peter.Ullrich at kapsch.net (Ullrich Peter)
Date: Sun, 14 Apr 2013 18:02:37 +0200
Subject: [sdiy] HP130C scope issue
In-Reply-To: <516A90C0.7010508@imt.net>
References: <516A90C0.7010508@imt.net>
Message-ID: <B156A86831A33949A0977840648802478B1BA5AD78@S060VS20.kapsch.co.at>

Hi Bob!

Do you have the Service Manual for it?

If not then you can load it from here for free (2 manuals per day for free)

http://elektrotanya.com/hp_130c.pdf/download.html
http://elektrotanya.com/hp_130c_sm2.pdf/download.html

Maybe you can find some hints there...

Ciao
Peter

http://www.ullrich.at.tt
________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Bob Weigel [sounddoctorin at imt.net]
Gesendet: Sonntag, 14. April 2013 13:19
An: synthdiy
Betreff: [sdiy] HP130C scope issue

Gotta love me still using a 1962 HP scope...but..This is so strange.  My
scope I'm so used to I refuse to ditch it..lol... besides it's full of
telefunken EC88 tubes.  ... I have had it out of cal for a while and a
JITTER in the trigger.  I mean you can trigger if you get right on the
edge but anywhere between it's bouncing around from some 60hz
modulation.  Oh and I opened it because an electrolytic was
smelling...found that and replaced it..the final one that has the 250
and 100V filters to ground on it.  Replaced with an 80uF since I had a
can NOS in a box.

ANyway the jitter was still there sadly.  But I found with another scope
that there is signal on the 250V that rises WITH the jitter..(Initially
there is no perceivable jitter..but after a few minutes it's quite bad.
Typically seeing three waveforms offset by a few mm when it's in it's
warmed up mode)

The 250V comes right off a diode from a xformer winding... with a 150uF
cap between it and the regulator feed for the 100V  (There are two
transformer windings stacked with a regulator for the 100V between..then
ground..then another similar circuit for -100V below that)...and
initially it was more like almost 300V!  And again..no adjustment for
that.  I probably should have just made a regulator and the issue might
be gone.

Instead I assume it was the other cap. I replaced the 150 with a 470uF
.  THE MAGNITUDE dropped..but otherwise it basically went through the
same routine.  So strange... with the simple nature of the circuit I
just can't see another contributor.  The waveform is certainly smoother
now... but it's got a rounded saw wave that's near what it was before
when it warms up a few minutes!

Then I put in a 10W zener at 33V with a 10Ohm inrush limit to drop the
voltage down to near spec at 261V.  Now I've got some jitter all the
time probably from the 10ohm resistor though I thought it probably
wouldn't introduce enough ripple..I'm too tired to think.  If anyone has
another idea who's maybe seen this kind of thing in the past.... I can't
believe I spent that much time on this relic.  I sure must love it
dearly.  lol

--
Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!

_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
The information contained in this e-mail message is privileged and
confidential and is for the exclusive use of the addressee. The person
who receives this message and who is not the addressee, one of his
employees or an agent entitled to hand it over to the addressee, is
informed that he may not use, disclose or reproduce the contents
thereof, and is kindly asked to notify the sender and delete the e-mail
immediately.




From neil.johnson97 at ntlworld.com  Sun Apr 14 20:20:29 2013
From: neil.johnson97 at ntlworld.com (Neil Johnson)
Date: Sun, 14 Apr 2013 19:20:29 +0100
Subject: [sdiy] HP130C scope issue
In-Reply-To: <B156A86831A33949A0977840648802478B1BA5AD78@S060VS20.kapsch.co.at>
References: <516A90C0.7010508@imt.net>
	<B156A86831A33949A0977840648802478B1BA5AD78@S060VS20.kapsch.co.at>
Message-ID: <516AF36D.7080208@ntlworld.com>

Ullrich Peter wrote:
> Do you have the Service Manual for it?
>
> If not then you can load it from here for free (2 manuals per day for free)
>
> http://elektrotanya.com/hp_130c.pdf/download.html
> http://elektrotanya.com/hp_130c_sm2.pdf/download.html
>
> Maybe you can find some hints there...

Or download it from Agilent's site as many times per day as you want:

http://www.home.agilent.com/agilent/facet.jspx?t=79841.g.1&cc=GB&lc=eng&sm=g

Agilent (HP as-was) service manuals are a valuable resource for anyone 
who wants to learn the craft of analogue circuit design.

Neil
-- 
Modules and more :: www.cesyg.com
Homepage :: www.njohnson.co.uk ::


From sounddoctorin at imt.net  Sun Apr 14 22:29:49 2013
From: sounddoctorin at imt.net (Bob Weigel)
Date: Sun, 14 Apr 2013 14:29:49 -0600
Subject: [sdiy] HP130C scope issue
In-Reply-To: <516AF36D.7080208@ntlworld.com>
References: <516A90C0.7010508@imt.net>	<B156A86831A33949A0977840648802478B1BA5AD78@S060VS20.kapsch.co.at>
	<516AF36D.7080208@ntlworld.com>
Message-ID: <516B11BD.2090708@imt.net>

On 4/14/2013 12:20 PM, Neil Johnson wrote:
> Ullrich Peter wrote:
>> Do you have the Service Manual for it?
Yes I have a wonderful hard copy... my tired eyes missed something 
obvious though. lol.  I didn't trace a line right and through the top 
250V was running unregulated (as reinforced by the 7volt tolerences 
listed for it while the 100V is called to be dead on with no tolerences 
given)

Some crud blew up in the regulator for the 250V obviously and it just 
manifests this strange-oh thing that comes on with minutes of use where 
the ripple increases to become a factor.  lol.  I can now see the 
stressed resistor. Pulling that board


From lightburnx at yahoo.com  Mon Apr 15 03:18:43 2013
From: lightburnx at yahoo.com (Kyle Stephens)
Date: Sun, 14 Apr 2013 18:18:43 -0700 (PDT)
Subject: [sdiy] Maker Faire 2013 in San Mateo
Message-ID: <1365988723.37186.YahooMailClassic@web126004.mail.ne1.yahoo.com>

So, Maker Faire in San Mateo, coming up this weekend.

http://makerfaire.com/bayarea-2012-makerinfo/

Any list members going, either as attendees or Makers even?

Could talk shop or get one of the 3-D printers to fab a bunch of knobs for us.


_Kyle


From music.maker at gte.net  Mon Apr 15 05:53:41 2013
From: music.maker at gte.net (Scott Gravenhorst)
Date: Sun, 14 Apr 2013 20:53:41 -0700
Subject: [sdiy] More SMT
Message-ID: <201304150353.r3F3rfeq013889@linux7.lan>


This is regarding a video which depicted using a Schmartboard to solder a 64 pin 0.5 mm
pitch TQFP package.  The video showed a fine point soldering tip being used and the
process was to use the point of the tip to push solder already on the traces leading to
the IC pins.

I do not have such a soldering tip, but I did have a good quality small chisel tip (I'm
guessing 3/16" wide).  

I first put paste flux on the Schmartboard with a toothpick.  Just a slime coating.  Then
I put the IC onto the board and after several attempts got it lined up.  It's tiny stuff
for me, so I had to use a magnifier (telescope eyepiece in my case) to make sure that the
IC leads lined up with the traces and that all were going to connect properly.  

I taped the board onto my desk with masking tape.  I then taped the IC to the board once
I had it registered correctly.

I then cleaned my iron well and applied a very small amount of solder to the iron and
dragged it while heating both the board traces and the IC pins.

Of course there was a small amount of "too much solder" which made bridges.

I wiped and cleaned the soldering iron as much as I could and re-dragged the same places
on the board.  This caused solder to come out from the bridges and go onto the PCB
traces.  I used the magnifier to look at the solder job and it looks clean.  I will "ring
it out" tomorrow to see if I need to use solder wick.

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
-- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
-- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
-- When the going gets tough, the tough use the command line.



From subjectivity at hotmail.com  Mon Apr 15 06:08:01 2013
From: subjectivity at hotmail.com (dan snazelle)
Date: Mon, 15 Apr 2013 00:08:01 -0400
Subject: [sdiy] More SMT
In-Reply-To: <201304150353.r3F3rfeq013889@linux7.lan>
References: <201304150353.r3F3rfeq013889@linux7.lan>
Message-ID: <BLU0-SMTP119D9099E8EE2614FA3D2EDC8CC0@phx.gbl>



On Apr 14, 2013, at 11:53 PM, Scott Gravenhorst wrote:

> 
> This is regarding a video which depicted using a Schmartboard to solder a 64 pin 0.5 mm
> pitch TQFP package.  The video showed a fine point soldering tip being used and the
> process was to use the point of the tip to push solder already on the traces leading to
> the IC pins.
> 
> I do not have such a soldering tip, but I did have a good quality small chisel tip (I'm
> guessing 3/16" wide).  
> 
> I first put paste flux on the Schmartboard with a toothpick.  Just a slime coating.  Then
> I put the IC onto the board and after several attempts got it lined up.  It's tiny stuff
> for me, so I had to use a magnifier (telescope eyepiece in my case) to make sure that the
> IC leads lined up with the traces and that all were going to connect properly.  
> 
> I taped the board onto my desk with masking tape.  I then taped the IC to the board once
> I had it registered correctly.
> 
> I then cleaned my iron well and applied a very small amount of solder to the iron and
> dragged it while heating both the board traces and the IC pins.
> 
> Of course there was a small amount of "too much solder" which made bridges.
> 
> I wiped and cleaned the soldering iron as much as I could and re-dragged the same places
> on the board.  This caused solder to come out from the bridges and go onto the PCB
> traces.  I used the magnifier to look at the solder job and it looks clean.  I will "ring
> it out" tomorrow to see if I need to use solder wick.
> 
> -- ScottG
> ________________________________________________________________________
> -- Scott Gravenhorst
> -- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
> -- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
> -- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
> -- When the going gets tough, the tough use the command line.
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 



informative post! can you explain how you taped the chip down? what kind of tape? and did you put it over the chip or behind it?

thanks




From dlmanley at sonic.net  Mon Apr 15 06:18:26 2013
From: dlmanley at sonic.net (Dave Manley)
Date: Sun, 14 Apr 2013 21:18:26 -0700
Subject: [sdiy] More SMT
In-Reply-To: <BLU0-SMTP119D9099E8EE2614FA3D2EDC8CC0@phx.gbl>
References: <201304150353.r3F3rfeq013889@linux7.lan>
	<BLU0-SMTP119D9099E8EE2614FA3D2EDC8CC0@phx.gbl>
Message-ID: <516B7F92.3080108@sonic.net>

On 4/14/2013 9:08 PM, dan snazelle wrote:
>
>
> On Apr 14, 2013, at 11:53 PM, Scott Gravenhorst wrote:
>
>>
>> This is regarding a video which depicted using a Schmartboard to solder a 64 pin 0.5 mm
>> pitch TQFP package.  The video showed a fine point soldering tip being used and the
>> process was to use the point of the tip to push solder already on the traces leading to
>> the IC pins.
>>
>> I do not have such a soldering tip, but I did have a good quality small chisel tip (I'm
>> guessing 3/16" wide).
>>
>> I first put paste flux on the Schmartboard with a toothpick.  Just a slime coating.  Then
>> I put the IC onto the board and after several attempts got it lined up.  It's tiny stuff
>> for me, so I had to use a magnifier (telescope eyepiece in my case) to make sure that the
>> IC leads lined up with the traces and that all were going to connect properly.
>>
>> I taped the board onto my desk with masking tape.  I then taped the IC to the board once
>> I had it registered correctly.
>>
>> I then cleaned my iron well and applied a very small amount of solder to the iron and
>> dragged it while heating both the board traces and the IC pins.
>>
>> Of course there was a small amount of "too much solder" which made bridges.
>>
>> I wiped and cleaned the soldering iron as much as I could and re-dragged the same places
>> on the board.  This caused solder to come out from the bridges and go onto the PCB
>> traces.  I used the magnifier to look at the solder job and it looks clean.  I will "ring
>> it out" tomorrow to see if I need to use solder wick.
>>
>> -- ScottG
>> ________________________________________________________________________
>> -- Scott Gravenhorst
>> -- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
>> -- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
>> -- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
>> -- When the going gets tough, the tough use the command line.
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>
>
>
> informative post! can you explain how you taped the chip down? what kind of tape? and did you put it over the chip or behind it?
>

There's no need to tape down the part - just put some solder on one of the corner pads, and then under
the microscope/magnifier heat the pad and push the corner lead into place.  Then tack down the opposite
corner and then do the 'drag solder' thing for the rest.  Use a lot of liquid flux.

Gets very easy after you do a few of them.

-Dave



From music.maker at gte.net  Mon Apr 15 06:28:52 2013
From: music.maker at gte.net (Scott Gravenhorst)
Date: Sun, 14 Apr 2013 21:28:52 -0700
Subject: [sdiy] More SMT
Message-ID: <201304150428.r3F4SqHG023125@linux7.lan>


Dave Manley <dlmanley at sonic.net> wrote:
>On 4/14/2013 9:08 PM, dan snazelle wrote:
>>
>>
>> On Apr 14, 2013, at 11:53 PM, Scott Gravenhorst wrote:
>>
>>>
>>> This is regarding a video which depicted using a Schmartboard to solder a 64 pin 0.5 mm
>>> pitch TQFP package.  The video showed a fine point soldering tip being used and the
>>> process was to use the point of the tip to push solder already on the traces leading to
>>> the IC pins.
>>>
>>> I do not have such a soldering tip, but I did have a good quality small chisel tip (I'm
>>> guessing 3/16" wide).
>>>
>>> I first put paste flux on the Schmartboard with a toothpick. 
>Just a slime coating. Then >> I put the IC onto the board and 
>after several attempts got it lined up. It's tiny stuff >> for 
>me, so I had to use a magnifier (telescope eyepiece in my case) 
>to make sure that the >> IC leads lined up with the traces and 
>that all were going to connect properly. >> >> I taped the board 
>onto my desk with masking tape. I then taped the IC to the board 
>once >> I had it registered correctly. >> >> I then cleaned my 
>iron well and applied a very small amount of solder to the iron 
>and >> dragged it while heating both the board traces and the IC 
>pins. >> >> Of course there was a small amount of "too much 
>solder" which made bridges. >> >> I wiped and cleaned the 
>soldering iron as much as I could and re-dragged the same places 
>>> on the board. This caused solder to come out from the bridges 
>and go onto the PCB >> traces. I used the magnifier to look at 
>the solder job and it looks clean. I will "ring >> it out" 
>tomorrow to see if I need to use solder wick. >> >> -- ScottG >> 
>________________________________________________________________________ 
>>> -- Scott Gravenhorst >> -- FPGA MIDI Synth Info: 
>jovianpyx.dyndns.org:8080/public/FPGA_synth/ >> -- FatMan Mods 
>Etc.: jovianpyx.dyndns.org:8080/public/fatman/ >> -- Some Random 
>Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/ 
>>> -- When the going gets tough, the tough use the command line. 
>>> >> _______________________________________________ >> 
>Synth-diy mailing list >> Synth-diy at dropmix.xs4all.nl >> 
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy >> > > > > 
>informative post! can you explain how you taped the chip down? 
>what kind of tape? and did you put it over the chip or behind it? 
>> 
>
>There's no need to tape down the part - just put some solder on 
>one of the corner pads, and then under the microscope/magnifier 
>heat the pad and push the corner lead into place. Then tack down 
>the opposite corner and then do the 'drag solder' thing for the 
>rest. Use a lot of liquid flux. 
>
>Gets very easy after you do a few of them.
>
>-Dave
>

I was paranoid about soldering if it wasn't held down somehow.  I used masking tape.  I do agree
that it is probably not necessary since the paste flux is sticky and these boards have a heavy
solder mask that helps align the pins.




-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
-- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
-- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
-- When the going gets tough, the tough use the command line.



From igg.debus at t-online.de  Mon Apr 15 16:57:09 2013
From: igg.debus at t-online.de (Ingo Debus)
Date: Mon, 15 Apr 2013 16:57:09 +0200
Subject: [sdiy] More SMT
In-Reply-To: <201304150353.r3F3rfeq013889@linux7.lan>
References: <201304150353.r3F3rfeq013889@linux7.lan>
Message-ID: <EB7FC86D-1663-41F8-B03C-A8185733F476@t-online.de>


Am 15.04.2013 um 05:53 schrieb Scott Gravenhorst:

> I will "ring
> it out" tomorrow to see if I need to use solder wick.

I found that solder wick for leadfree solder works MUCH better than conventional wick, no matter if leaded or leadfree solder was used.

Ingo

From dlmanley at sonic.net  Mon Apr 15 17:43:34 2013
From: dlmanley at sonic.net (Dave Manley)
Date: Mon, 15 Apr 2013 08:43:34 -0700
Subject: [sdiy] More SMT
In-Reply-To: <201304150428.r3F4SqHG023125@linux7.lan>
References: <201304150428.r3F4SqHG023125@linux7.lan>
Message-ID: <516C2026.1030901@sonic.net>

On 4/14/2013 9:28 PM, Scott Gravenhorst wrote:

>
> I was paranoid about soldering if it wasn't held down somehow.  I used masking tape.  I do agree
> that it is probably not necessary since the paste flux is sticky and these boards have a heavy
> solder mask that helps align the pins.
>
>
>
>
> -- ScottG
> ________________________________________________________________________

For me the key is to preload the corner pad, and position that one first corner
pin.  Once that done the rest will follow.

-Dave



From juzowen at gmail.com  Mon Apr 15 18:19:05 2013
From: juzowen at gmail.com (Justin Owen)
Date: Mon, 15 Apr 2013 17:19:05 +0100
Subject: [sdiy] Jung op-amp cookbook editions help
Message-ID: <516c287a.8a0db40a.2f93.19b9@mx.google.com>

Hi,

My 1st edition Jung's IC op-amp cookbook has the Log Generator and Antilog (Exponential) Generator in Chapter 5.

Can anyone with the 3rd edition tell me where these two circuits have moved to please?

Trying to help someone with a 3rd ed. that can't find them!

Thanks,

Justin





From osalas at electronic-sea.net  Mon Apr 15 19:22:17 2013
From: osalas at electronic-sea.net (Oscar Salas)
Date: Mon, 15 Apr 2013 20:22:17 +0300
Subject: [sdiy] Jung op-amp cookbook editions help
In-Reply-To: <516c287a.8a0db40a.2f93.19b9@mx.google.com>
References: <516c287a.8a0db40a.2f93.19b9@mx.google.com>
Message-ID: <cb0b3e8fe9dd7534a345168f919985b4.squirrel@webmail.electronic-sea.net>

Hello,

Pag. 289
Chapter Six

> Hi,
>
> My 1st edition Jung's IC op-amp cookbook has the Log Generator and Antilog
> (Exponential) Generator in Chapter 5.
>
> Can anyone with the 3rd edition tell me where these two circuits have
> moved to please?
>
> Trying to help someone with a 3rd ed. that can't find them!
>
> Thanks,
>
> Justin
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>


electronic-sea.net



From juzowen at gmail.com  Mon Apr 15 19:56:39 2013
From: juzowen at gmail.com (Justin Owen)
Date: Mon, 15 Apr 2013 18:56:39 +0100
Subject: [sdiy] Jung op-amp cookbook editions help
Message-ID: <516c3f58.2550b40a.77a5.49c3@mx.google.com>

Thanks Oscar!

-----Original Message-----
From: Oscar Salas [osalas at electronic-sea.net]
Received: 15.04.2013 18:22:18
To: Justin Owen
Cc: SDIY List
Subject: Re: [sdiy] Jung op-amp cookbook editions help

Hello,

Pag. 289
Chapter Six

> Hi,
>
> My 1st edition Jung's IC op-amp cookbook has the Log Generator and Antilog
> (Exponential) Generator in Chapter 5.
>
> Can anyone with the 3rd edition tell me where these two circuits have
> moved to please?
>
> Trying to help someone with a 3rd ed. that can't find them!
>
> Thanks,
>
> Justin
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>


electronic-sea.net





From juzowen at gmail.com  Mon Apr 15 21:17:02 2013
From: juzowen at gmail.com (Justin Owen)
Date: Mon, 15 Apr 2013 20:17:02 +0100
Subject: [sdiy] FX send /return - wet/dry control operation
Message-ID: <516c5230.c20bb40a.5fc3.60f9@mx.google.com>

Hello,

Am I right to think that the wet/dry control control on a parallel FX send/return set up (e.g. like the Aux send on a mixer) is basically just a cross-fader type arrangement that increases the level of the wet/return signal while decreasing the level of the dry/original signal (or vice versa)?

So - a pot cross-fader in the simplest form or two VCAs for a more exotic number? 

Thanks,

J



From plutonique9 at hotmail.com  Mon Apr 15 21:38:53 2013
From: plutonique9 at hotmail.com (=?utf-8?B?UGx1dG9uaXE5IOKAog==?=)
Date: Mon, 15 Apr 2013 12:38:53 -0700
Subject: [sdiy] mini-din socket - panel mount?
Message-ID: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>

I'm trying to track down a 5-pin (or greater) mini din socket that can be panel mounted like a 1/4" with a nut. Does such a product exist? The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks in my EML-101 without needing to drill/modify the case.

Tanks in advance

Ryan (p9)

Sent from my iPhone

From paul at fitvideo.co.uk  Mon Apr 15 21:45:46 2013
From: paul at fitvideo.co.uk (Paul Burns)
Date: Mon, 15 Apr 2013 20:45:46 +0100
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
Message-ID: <003801ce3a11$d4959170$7dc0b450$@fitvideo.co.uk>

Like this?
http://uk.farnell.com/hirschmann/mab-5100-s-45/socket-din-panel-45deg-5pin/d
p/496510
regards
-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
Sent: 15 April 2013 20:39
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] mini-din socket - panel mount?

I'm trying to track down a 5-pin (or greater) mini din socket that can be
panel mounted like a 1/4" with a nut. Does such a product exist? The
footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks in my
EML-101 without needing to drill/modify the case.

Tanks in advance

Ryan (p9)

Sent from my iPhone
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From davebr at earthlink.net  Mon Apr 15 21:50:01 2013
From: davebr at earthlink.net (Dave Brown)
Date: Mon, 15 Apr 2013 12:50:01 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
Message-ID: <001101ce3a12$6b853f40$428fbdc0$@earthlink.net>

I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts list
and Mouser numbers are on the page.
http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf

The Mouser number is  161-381/4-E.  It takes a fairly large hole and there
is a flange on the front that I recessed.  It isn't necessary but the
details will be in my FrontPanelExpress file.  Note that this connector has
threads on the front so you can screw the mini-DIN on but I have been unable
to ever find the mating connector.  I've written to Mouser with no help but
have not tried asking Kobiconn.  The plugs stay inserted but they are a bit
loose.

Dave

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
Sent: Monday, April 15, 2013 12:39 PM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] mini-din socket - panel mount?

I'm trying to track down a 5-pin (or greater) mini din socket that can be
panel mounted like a 1/4" with a nut. Does such a product exist? The
footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks in my
EML-101 without needing to drill/modify the case.

Tanks in advance

Ryan (p9)

Sent from my iPhone
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy




From cheater00 at gmail.com  Mon Apr 15 21:50:30 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Mon, 15 Apr 2013 21:50:30 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
Message-ID: <CA+9GZUi4_r=f9ghAY=cZGrvBK4Q3nijtyfpOwuPUw-V+GQPJ8A@mail.gmail.com>

The plug is larger. Therefore the jack is very likely not going to fit
into the 1/4" jack's hole. And no - I haven't seen one of those
either.. panel mount simply doesn't happen in the kind of equipment
that uses mini din (for AV or as a power supply). But if anything, I'd
hit up neutrik...

On Mon, Apr 15, 2013 at 9:38 PM, Plutoniq9 ? <plutonique9 at hotmail.com> wrote:
> I'm trying to track down a 5-pin (or greater) mini din socket that can be panel mounted like a 1/4" with a nut. Does such a product exist? The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks in my EML-101 without needing to drill/modify the case.
>
> Tanks in advance
>
> Ryan (p9)
>
> Sent from my iPhone
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From cheater00 at gmail.com  Tue Apr 16 02:47:45 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Tue, 16 Apr 2013 02:47:45 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
Message-ID: <CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>

Dave and Paul,
those are DIN not Mini DIN. The following is a Mini din connector:
http://en.wikipedia.org/wiki/Mini-DIN_connector

examples include the "small" ps/2 mouse and keyboard connectors (not
the large ones like for midi), S-Video, and some multi-voltage power
supplies.

Ryan,
one way to do what you're trying is to use the existing hole to lead
the cables out into a small box that has the larger connector you'll
want to use. The box can be out of metal and have a flange integrated
into it that will screw the small box to the original chassis. This
way you can always unmod the synth to its original state. The whole
contraption can be very stable. You'd put a rubber washer around the
flange, between the small box and the original chassis.

Cheers,
D.

On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts list
> and Mouser numbers are on the page.
> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>
> The Mouser number is  161-381/4-E.  It takes a fairly large hole and there
> is a flange on the front that I recessed.  It isn't necessary but the
> details will be in my FrontPanelExpress file.  Note that this connector has
> threads on the front so you can screw the mini-DIN on but I have been unable
> to ever find the mating connector.  I've written to Mouser with no help but
> have not tried asking Kobiconn.  The plugs stay inserted but they are a bit
> loose.
>
> Dave
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
> Sent: Monday, April 15, 2013 12:39 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] mini-din socket - panel mount?
>
> I'm trying to track down a 5-pin (or greater) mini din socket that can be
> panel mounted like a 1/4" with a nut. Does such a product exist? The
> footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks in my
> EML-101 without needing to drill/modify the case.
>
> Tanks in advance
>
> Ryan (p9)
>
> Sent from my iPhone
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From lightburnx at yahoo.com  Tue Apr 16 03:36:37 2013
From: lightburnx at yahoo.com (Kyle Stephens)
Date: Mon, 15 Apr 2013 18:36:37 -0700 (PDT)
Subject: [sdiy] Maker Faire 2013 in San Mateo
In-Reply-To: <6151F5E7-AF05-413E-9288-C1AF556F693F@cox.net>
Message-ID: <1366076197.66782.YahooMailClassic@web126003.mail.ne1.yahoo.com>

Fart de la brain.

All the more time to plan then!


_Kyle

--- On Sun, 4/14/13, Barry Klein <barryklein at cox.net> wrote:

> From: Barry Klein <barryklein at cox.net>
> Subject: Re: [sdiy] Maker Faire 2013 in San Mateo
> To: "Kyle Stephens" <lightburnx at yahoo.com>
> Date: Sunday, April 14, 2013, 7:29 PM
> That's 2012.? 2013 in 33 days.
> 
> Sent from my iPhone
> 
> On Apr 14, 2013, at 6:18 PM, Kyle Stephens <lightburnx at yahoo.com>
> wrote:
> 
> > So, Maker Faire in San Mateo, coming up this weekend.
> > 
> > http://makerfaire.com/bayarea-2012-makerinfo/
> > 
> > Any list members going, either as attendees or Makers
> even?
> > 
> > Could talk shop or get one of the 3-D printers to fab a
> bunch of knobs for us.
> > 
> > 
> > _Kyle
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 


From niroke at tampabay.rr.com  Tue Apr 16 03:41:28 2013
From: niroke at tampabay.rr.com (Nicholas Keller)
Date: Mon, 15 Apr 2013 21:41:28 -0400
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
Message-ID: <005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>

I think I've found loads by doing a google search for "panel mount mini
DIN", the thing is you need to know the actual diameter of the hole on the
EML-101.  The hole is NOT 1/4" wide if it's a socket for 1/4" jack, as I'm
sure you know.  
Here are a few I just looked at....  most require a 13-14mm/.55" hole but
your EML might be closer to 3/8"

http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-panel-mo
unt.html
http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhead-jac
k-to-flying-leads-md-4-6-and-8-position-sizes-available
http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863



-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
Sent: Monday, April 15, 2013 8:48 PM
To: Dave Brown
Cc: synth-diy
Subject: Re: [sdiy] mini-din socket - panel mount?

Dave and Paul,
those are DIN not Mini DIN. The following is a Mini din connector:
http://en.wikipedia.org/wiki/Mini-DIN_connector

examples include the "small" ps/2 mouse and keyboard connectors (not the
large ones like for midi), S-Video, and some multi-voltage power supplies.

Ryan,
one way to do what you're trying is to use the existing hole to lead the
cables out into a small box that has the larger connector you'll want to
use. The box can be out of metal and have a flange integrated into it that
will screw the small box to the original chassis. This way you can always
unmod the synth to its original state. The whole contraption can be very
stable. You'd put a rubber washer around the flange, between the small box
and the original chassis.

Cheers,
D.

On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts 
> list and Mouser numbers are on the page.
> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>
> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
> there is a flange on the front that I recessed.  It isn't necessary 
> but the details will be in my FrontPanelExpress file.  Note that this 
> connector has threads on the front so you can screw the mini-DIN on 
> but I have been unable to ever find the mating connector.  I've 
> written to Mouser with no help but have not tried asking Kobiconn.  
> The plugs stay inserted but they are a bit loose.
>
> Dave
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
> Sent: Monday, April 15, 2013 12:39 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] mini-din socket - panel mount?
>
> I'm trying to track down a 5-pin (or greater) mini din socket that can 
> be panel mounted like a 1/4" with a nut. Does such a product exist? 
> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
> in my
> EML-101 without needing to drill/modify the case.
>
> Tanks in advance
>
> Ryan (p9)
>
> Sent from my iPhone
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From davebr at earthlink.net  Tue Apr 16 03:46:09 2013
From: davebr at earthlink.net (Dave Brown)
Date: Mon, 15 Apr 2013 18:46:09 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
Message-ID: <000901ce3a44$2c1eb480$845c1d80$@earthlink.net>

The 161-381/4-E is indeed a mini-DIN.  It looks just like the 4 pin picture
on the wiki page.  I know it is mini because of the magnifiers I had to use
to solder wires to both it and the plug - they are small indeed.  I didn't
want to use a DIN since I have MIDI connectors on the ComputerVoltageSource.
I kind of have regret my choice of mini-DIN since the plug doesn't stay in
all that secure.  One has never fallen out, but I sure wish I could find the
mating plug with the threads to screw it in.

Dave

-----Original Message-----
From: cheater00 . [mailto:cheater00 at gmail.com] 
Sent: Monday, April 15, 2013 5:48 PM
To: Dave Brown
Cc: Plutoniq9 .; synth-diy
Subject: Re: [sdiy] mini-din socket - panel mount?

Dave and Paul,
those are DIN not Mini DIN. The following is a Mini din connector:
http://en.wikipedia.org/wiki/Mini-DIN_connector

examples include the "small" ps/2 mouse and keyboard connectors (not the
large ones like for midi), S-Video, and some multi-voltage power supplies.

Ryan,
one way to do what you're trying is to use the existing hole to lead the
cables out into a small box that has the larger connector you'll want to
use. The box can be out of metal and have a flange integrated into it that
will screw the small box to the original chassis. This way you can always
unmod the synth to its original state. The whole contraption can be very
stable. You'd put a rubber washer around the flange, between the small box
and the original chassis.

Cheers,
D.

On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts 
> list and Mouser numbers are on the page.
> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>
> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
> there is a flange on the front that I recessed.  It isn't necessary 
> but the details will be in my FrontPanelExpress file.  Note that this 
> connector has threads on the front so you can screw the mini-DIN on 
> but I have been unable to ever find the mating connector.  I've 
> written to Mouser with no help but have not tried asking Kobiconn.  
> The plugs stay inserted but they are a bit loose.
>
> Dave
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
> Sent: Monday, April 15, 2013 12:39 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] mini-din socket - panel mount?
>
> I'm trying to track down a 5-pin (or greater) mini din socket that can 
> be panel mounted like a 1/4" with a nut. Does such a product exist? 
> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
> in my
> EML-101 without needing to drill/modify the case.
>
> Tanks in advance
>
> Ryan (p9)
>
> Sent from my iPhone
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy




From davebr at earthlink.net  Tue Apr 16 03:49:58 2013
From: davebr at earthlink.net (Dave Brown)
Date: Mon, 15 Apr 2013 18:49:58 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
Message-ID: <000d01ce3a44$b40cadc0$1c260940$@earthlink.net>

The 161-381/4-E I used on the ComputerVoltageSource has a 0.55" D hole with
a 0.64" diameter recess 0.06" into the panel for the flange.  The holes are
not small although the connector is.

I'd be grateful if anyone can find a mating plug which takes advantage of
the external threads on the 161-381/4-E.

Dave

-----Original Message-----
From: Nicholas Keller [mailto:niroke at tampabay.rr.com] 
Sent: Monday, April 15, 2013 6:41 PM
To: 'cheater00 .'; 'Dave Brown'
Cc: 'synth-diy'
Subject: RE: [sdiy] mini-din socket - panel mount?

I think I've found loads by doing a google search for "panel mount mini
DIN", the thing is you need to know the actual diameter of the hole on the
EML-101.  The hole is NOT 1/4" wide if it's a socket for 1/4" jack, as I'm
sure you know.  
Here are a few I just looked at....  most require a 13-14mm/.55" hole but
your EML might be closer to 3/8"

http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-panel-mo
unt.html
http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhead-jac
k-to-flying-leads-md-4-6-and-8-position-sizes-available
http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863



-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
Sent: Monday, April 15, 2013 8:48 PM
To: Dave Brown
Cc: synth-diy
Subject: Re: [sdiy] mini-din socket - panel mount?

Dave and Paul,
those are DIN not Mini DIN. The following is a Mini din connector:
http://en.wikipedia.org/wiki/Mini-DIN_connector

examples include the "small" ps/2 mouse and keyboard connectors (not the
large ones like for midi), S-Video, and some multi-voltage power supplies.

Ryan,
one way to do what you're trying is to use the existing hole to lead the
cables out into a small box that has the larger connector you'll want to
use. The box can be out of metal and have a flange integrated into it that
will screw the small box to the original chassis. This way you can always
unmod the synth to its original state. The whole contraption can be very
stable. You'd put a rubber washer around the flange, between the small box
and the original chassis.

Cheers,
D.

On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts 
> list and Mouser numbers are on the page.
> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>
> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
> there is a flange on the front that I recessed.  It isn't necessary 
> but the details will be in my FrontPanelExpress file.  Note that this 
> connector has threads on the front so you can screw the mini-DIN on 
> but I have been unable to ever find the mating connector.  I've 
> written to Mouser with no help but have not tried asking Kobiconn.
> The plugs stay inserted but they are a bit loose.
>
> Dave
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
> Sent: Monday, April 15, 2013 12:39 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] mini-din socket - panel mount?
>
> I'm trying to track down a 5-pin (or greater) mini din socket that can 
> be panel mounted like a 1/4" with a nut. Does such a product exist?
> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
> in my
> EML-101 without needing to drill/modify the case.
>
> Tanks in advance
>
> Ryan (p9)
>
> Sent from my iPhone
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy





From cheater00 at gmail.com  Tue Apr 16 16:14:00 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Tue, 16 Apr 2013 16:14:00 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <000d01ce3a44$b40cadc0$1c260940$@earthlink.net>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<000d01ce3a44$b40cadc0$1c260940$@earthlink.net>
Message-ID: <CA+9GZUhKPJPcaZ2ThRHTyix=wUd3V8L3S49GOPhArXOKSbqqtA@mail.gmail.com>

You can possibly find a generic cylinder which will go on the cable
before the actual plug; the plug would slide into it and the cylinder
would be used to screw it in place. Worst case scenario is that you
can have it machined.

What are you using the mini din for if not for midi?

Cheers,
D.

On Tue, Apr 16, 2013 at 3:49 AM, Dave Brown <davebr at earthlink.net> wrote:
> The 161-381/4-E I used on the ComputerVoltageSource has a 0.55" D hole with
> a 0.64" diameter recess 0.06" into the panel for the flange.  The holes are
> not small although the connector is.
>
> I'd be grateful if anyone can find a mating plug which takes advantage of
> the external threads on the 161-381/4-E.
>
> Dave
>
> -----Original Message-----
> From: Nicholas Keller [mailto:niroke at tampabay.rr.com]
> Sent: Monday, April 15, 2013 6:41 PM
> To: 'cheater00 .'; 'Dave Brown'
> Cc: 'synth-diy'
> Subject: RE: [sdiy] mini-din socket - panel mount?
>
> I think I've found loads by doing a google search for "panel mount mini
> DIN", the thing is you need to know the actual diameter of the hole on the
> EML-101.  The hole is NOT 1/4" wide if it's a socket for 1/4" jack, as I'm
> sure you know.
> Here are a few I just looked at....  most require a 13-14mm/.55" hole but
> your EML might be closer to 3/8"
>
> http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-panel-mo
> unt.html
> http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhead-jac
> k-to-flying-leads-md-4-6-and-8-position-sizes-available
> http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863
>
>
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
> Sent: Monday, April 15, 2013 8:48 PM
> To: Dave Brown
> Cc: synth-diy
> Subject: Re: [sdiy] mini-din socket - panel mount?
>
> Dave and Paul,
> those are DIN not Mini DIN. The following is a Mini din connector:
> http://en.wikipedia.org/wiki/Mini-DIN_connector
>
> examples include the "small" ps/2 mouse and keyboard connectors (not the
> large ones like for midi), S-Video, and some multi-voltage power supplies.
>
> Ryan,
> one way to do what you're trying is to use the existing hole to lead the
> cables out into a small box that has the larger connector you'll want to
> use. The box can be out of metal and have a flange integrated into it that
> will screw the small box to the original chassis. This way you can always
> unmod the synth to its original state. The whole contraption can be very
> stable. You'd put a rubber washer around the flange, between the small box
> and the original chassis.
>
> Cheers,
> D.
>
> On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
>> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts
>> list and Mouser numbers are on the page.
>> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>>
>> The Mouser number is  161-381/4-E.  It takes a fairly large hole and
>> there is a flange on the front that I recessed.  It isn't necessary
>> but the details will be in my FrontPanelExpress file.  Note that this
>> connector has threads on the front so you can screw the mini-DIN on
>> but I have been unable to ever find the mating connector.  I've
>> written to Mouser with no help but have not tried asking Kobiconn.
>> The plugs stay inserted but they are a bit loose.
>>
>> Dave
>>
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
>> Sent: Monday, April 15, 2013 12:39 PM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: [sdiy] mini-din socket - panel mount?
>>
>> I'm trying to track down a 5-pin (or greater) mini din socket that can
>> be panel mounted like a 1/4" with a nut. Does such a product exist?
>> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks
>> in my
>> EML-101 without needing to drill/modify the case.
>>
>> Tanks in advance
>>
>> Ryan (p9)
>>
>> Sent from my iPhone
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>


From cheater00 at gmail.com  Tue Apr 16 16:22:54 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Tue, 16 Apr 2013 16:22:54 +0200
Subject: [sdiy]  SDIY Wiki - books
Message-ID: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>

Hi guys,
following Rob's recently announced wiki, I thought it would be a good
idea for another round-up of books related to synths, analog design,
and anything else of interest. Please post your suggestions like this:

author - name - short description of why this book is great.

Once this thread gains momentum, someone can go through the whole
thing and add the books to the wiki in an article called "Books"

If you want you can add info about the year or the isbn (isbn is
especially great for obscure books)

Please don't hesitate to re-post books that have been mentioned already.

Maybe someone with a lot of time on their hands can go through the
archives, search for "book" or "books" or "amazon" or "chapter", and
simply round up everything. It would be nice to have such an
aggregation of what books have been mentioned previously.

I hope to kickstart some sort of collaboration and maybe this way we
can start doing more stuff together! That would be really cool..

Cheers,
D.


From juzowen at gmail.com  Tue Apr 16 18:29:50 2013
From: juzowen at gmail.com (Justin Owen)
Date: Tue, 16 Apr 2013 17:29:50 +0100
Subject: [sdiy] FX send /return - wet/dry control operation
Message-ID: <516d7c7f.440ab40a.4d3f.3ead@mx.google.com>

Bump?

:)

-----Original Message-----
From: Justin Owen [juzowen at gmail.com]
Received: 15.04.2013 20:17:07
To: SDIY List
Subject: FX send /return - wet/dry control operation

Hello,

Am I right to think that the wet/dry control control on a parallel FX send/return set up (e.g. like the Aux send on a mixer) is basically just a cross-fader type arrangement that increases the level of the wet/return signal while decreasing the level of the dry/original signal (or vice versa)?

So - a pot cross-fader in the simplest form or two VCAs for a more exotic number? 

Thanks,

J



From neil.johnson97 at ntlworld.com  Tue Apr 16 19:03:09 2013
From: neil.johnson97 at ntlworld.com (Neil Johnson)
Date: Tue, 16 Apr 2013 18:03:09 +0100
Subject: [sdiy] FX send /return - wet/dry control operation
In-Reply-To: <516d7c7f.440ab40a.4d3f.3ead@mx.google.com>
References: <516d7c7f.440ab40a.4d3f.3ead@mx.google.com>
Message-ID: <CAEaByMQT6NbWqsNL+NMKtbhX_K+JoNyWmAfSMTsatv+1g32JXQ@mail.gmail.com>

The AUX send on a mixer is send only.  The returns tend to be
completely separate circuits.  I've only heard of one mixer having a
wet/dry pot on an insert (useful for per-channel effect) but that was
a bit of an oddity.

But yes, wet/dry is simply a mix between the raw (dry) and processed
(wet).  The simplest way to do this is to apply both signals to each
end of a pot's track, and then the mix comes from the wiper.  There
are nicer ways to do this of course.

Neil

On 16 April 2013 17:29, Justin Owen <juzowen at gmail.com> wrote:
> Bump?
>
> :)
>
> -----Original Message-----
> From: Justin Owen [juzowen at gmail.com]
> Received: 15.04.2013 20:17:07
> To: SDIY List
> Subject: FX send /return - wet/dry control operation
>
> Hello,
>
> Am I right to think that the wet/dry control control on a parallel FX send/return set up (e.g. like the Aux send on a mixer) is basically just a cross-fader type arrangement that increases the level of the wet/return signal while decreasing the level of the dry/original signal (or vice versa)?
>
> So - a pot cross-fader in the simplest form or two VCAs for a more exotic number?
>
> Thanks,
>
> J
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



-- 
Modules and more: http://www.cesyg.com
Homepage: http://www.njohnson.co.uk


From davebr at earthlink.net  Tue Apr 16 19:06:54 2013
From: davebr at earthlink.net (Dave Brown)
Date: Tue, 16 Apr 2013 10:06:54 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
Message-ID: <000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>

The Jameco and the Digikey both have front threads similar to the Kobiconn -
but why?  At first I thought it might be to have the nut in front of the
panel rather than behind but the front threads have little depth and the
data sheet only shows the nut on the rear.  I keep thinking there may be a
mini-DIN plug with a locking screw collar but have been unable to find
anything except a couple of pictures at Finecables.

Dave

-----Original Message-----
From: Nicholas Keller [mailto:niroke at tampabay.rr.com] 
Sent: Monday, April 15, 2013 6:41 PM
To: 'cheater00 .'; 'Dave Brown'
Cc: 'synth-diy'
Subject: RE: [sdiy] mini-din socket - panel mount?

I think I've found loads by doing a google search for "panel mount mini
DIN", the thing is you need to know the actual diameter of the hole on the
EML-101.  The hole is NOT 1/4" wide if it's a socket for 1/4" jack, as I'm
sure you know.  
Here are a few I just looked at....  most require a 13-14mm/.55" hole but
your EML might be closer to 3/8"

http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-panel-mo
unt.html
http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhead-jac
k-to-flying-leads-md-4-6-and-8-position-sizes-available
http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863



-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
Sent: Monday, April 15, 2013 8:48 PM
To: Dave Brown
Cc: synth-diy
Subject: Re: [sdiy] mini-din socket - panel mount?

Dave and Paul,
those are DIN not Mini DIN. The following is a Mini din connector:
http://en.wikipedia.org/wiki/Mini-DIN_connector

examples include the "small" ps/2 mouse and keyboard connectors (not the
large ones like for midi), S-Video, and some multi-voltage power supplies.

Ryan,
one way to do what you're trying is to use the existing hole to lead the
cables out into a small box that has the larger connector you'll want to
use. The box can be out of metal and have a flange integrated into it that
will screw the small box to the original chassis. This way you can always
unmod the synth to its original state. The whole contraption can be very
stable. You'd put a rubber washer around the flange, between the small box
and the original chassis.

Cheers,
D.

On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts 
> list and Mouser numbers are on the page.
> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>
> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
> there is a flange on the front that I recessed.  It isn't necessary 
> but the details will be in my FrontPanelExpress file.  Note that this 
> connector has threads on the front so you can screw the mini-DIN on 
> but I have been unable to ever find the mating connector.  I've 
> written to Mouser with no help but have not tried asking Kobiconn.
> The plugs stay inserted but they are a bit loose.
>
> Dave
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
> Sent: Monday, April 15, 2013 12:39 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] mini-din socket - panel mount?
>
> I'm trying to track down a 5-pin (or greater) mini din socket that can 
> be panel mounted like a 1/4" with a nut. Does such a product exist?
> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
> in my
> EML-101 without needing to drill/modify the case.
>
> Tanks in advance
>
> Ryan (p9)
>
> Sent from my iPhone
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy





From davebr at earthlink.net  Tue Apr 16 19:17:46 2013
From: davebr at earthlink.net (Dave Brown)
Date: Tue, 16 Apr 2013 10:17:46 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <CA+9GZUhKPJPcaZ2ThRHTyix=wUd3V8L3S49GOPhArXOKSbqqtA@mail.gmail.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<000d01ce3a44$b40cadc0$1c260940$@earthlink.net>
	<CA+9GZUhKPJPcaZ2ThRHTyix=wUd3V8L3S49GOPhArXOKSbqqtA@mail.gmail.com>
Message-ID: <000e01ce3ac6$5ba3cc40$12eb64c0$@earthlink.net>

I've actually never seen mini-DIN used for MIDI, just the standard 5 pin
DIN.  I'm using the 4 pin mini-DIN connector for I2C (4 pins) to external
peripherals for my ComputerVoltageSource.  In this case it is to a 12 key
keypad and external control that I use for my Supersequencer program.
Originally I repurposed one of the 16 controls for input, but then I always
had to set it back up for the sequencer controls so I decided I really
needed 17 controls.  I threw the keypad in because I had an extra analog
input channel.  I also did an I2C expansion board that gives me an
additional 16 analog inputs or 16 digital inputs/outputs.

Dave

-----Original Message-----
From: cheater00 . [mailto:cheater00 at gmail.com] 
Sent: Tuesday, April 16, 2013 7:14 AM
To: Dave Brown
Cc: Nicholas Keller; synth-diy
Subject: Re: [sdiy] mini-din socket - panel mount?

You can possibly find a generic cylinder which will go on the cable before
the actual plug; the plug would slide into it and the cylinder would be used
to screw it in place. Worst case scenario is that you can have it machined.

What are you using the mini din for if not for midi?

Cheers,
D.

On Tue, Apr 16, 2013 at 3:49 AM, Dave Brown <davebr at earthlink.net> wrote:
> The 161-381/4-E I used on the ComputerVoltageSource has a 0.55" D hole 
> with a 0.64" diameter recess 0.06" into the panel for the flange.  The 
> holes are not small although the connector is.
>
> I'd be grateful if anyone can find a mating plug which takes advantage 
> of the external threads on the 161-381/4-E.
>
> Dave
>
> -----Original Message-----
> From: Nicholas Keller [mailto:niroke at tampabay.rr.com]
> Sent: Monday, April 15, 2013 6:41 PM
> To: 'cheater00 .'; 'Dave Brown'
> Cc: 'synth-diy'
> Subject: RE: [sdiy] mini-din socket - panel mount?
>
> I think I've found loads by doing a google search for "panel mount 
> mini DIN", the thing is you need to know the actual diameter of the 
> hole on the EML-101.  The hole is NOT 1/4" wide if it's a socket for 
> 1/4" jack, as I'm sure you know.
> Here are a few I just looked at....  most require a 13-14mm/.55" hole 
> but your EML might be closer to 3/8"
>
> http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-pa
> nel-mo
> unt.html
> http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhe
> ad-jac k-to-flying-leads-md-4-6-and-8-position-sizes-available
> http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863
>
>
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
> Sent: Monday, April 15, 2013 8:48 PM
> To: Dave Brown
> Cc: synth-diy
> Subject: Re: [sdiy] mini-din socket - panel mount?
>
> Dave and Paul,
> those are DIN not Mini DIN. The following is a Mini din connector:
> http://en.wikipedia.org/wiki/Mini-DIN_connector
>
> examples include the "small" ps/2 mouse and keyboard connectors (not 
> the large ones like for midi), S-Video, and some multi-voltage power
supplies.
>
> Ryan,
> one way to do what you're trying is to use the existing hole to lead 
> the cables out into a small box that has the larger connector you'll 
> want to use. The box can be out of metal and have a flange integrated 
> into it that will screw the small box to the original chassis. This 
> way you can always unmod the synth to its original state. The whole 
> contraption can be very stable. You'd put a rubber washer around the 
> flange, between the small box and the original chassis.
>
> Cheers,
> D.
>
> On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
>> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The 
>> parts list and Mouser numbers are on the page.
>> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>>
>> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
>> there is a flange on the front that I recessed.  It isn't necessary 
>> but the details will be in my FrontPanelExpress file.  Note that this 
>> connector has threads on the front so you can screw the mini-DIN on 
>> but I have been unable to ever find the mating connector.  I've 
>> written to Mouser with no help but have not tried asking Kobiconn.
>> The plugs stay inserted but they are a bit loose.
>>
>> Dave
>>
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
>> Sent: Monday, April 15, 2013 12:39 PM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: [sdiy] mini-din socket - panel mount?
>>
>> I'm trying to track down a 5-pin (or greater) mini din socket that 
>> can be panel mounted like a 1/4" with a nut. Does such a product exist?
>> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
>> in my
>> EML-101 without needing to drill/modify the case.
>>
>> Tanks in advance
>>
>> Ryan (p9)
>>
>> Sent from my iPhone
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>




From don at till.com  Tue Apr 16 19:24:43 2013
From: don at till.com (Donald Tillman)
Date: Tue, 16 Apr 2013 10:24:43 -0700
Subject: [sdiy] FX send /return - wet/dry control operation
In-Reply-To: <516c5230.c20bb40a.5fc3.60f9@mx.google.com>
References: <516c5230.c20bb40a.5fc3.60f9@mx.google.com>
Message-ID: <0F6FA67E-5FC0-4764-A628-241A6F246321@till.com>

On Apr 15, 2013, at 12:17 PM, Justin Owen <juzowen at gmail.com> wrote:

> Am I right to think that the wet/dry control control on a parallel FX send/return set up (e.g. like the Aux send on a mixer) is basically just a cross-fader type arrangement that increases the level of the wet/return signal while decreasing the level of the dry/original signal (or vice versa)?

(we respond to a bump...  :-) )

I don't think so.  The send/return paths found on mixers, and I'm thinking of units like the Mackies, they just mix the padded effects return signal in at that point.

A pot dry/mix/wet control is actually more of a series proposition.  For something like that mixers typically use an "insert" and relegate the adjustment to the effects box.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com






From plutonique9 at hotmail.com  Tue Apr 16 22:18:00 2013
From: plutonique9 at hotmail.com (=?utf-8?B?UGx1dG9uaXE5IOKAog==?=)
Date: Tue, 16 Apr 2013 13:18:00 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
Message-ID: <BAY401-EAS222F51E37704405FDCBF2E9E2CD0@phx.gbl>

Thanks all for the input, I'll search the links y'all provided. I'm hoping to not have to modify the case any, I couldn't bring myself to drill through the panel (again).

My plan : Each of the (4) oscillators provide 2-5 waveforms simultaneously, so having direct outs for these would offer some interesting flexibility I'm thinking. If I can replace the current 1/4 output it currently has for each oscillator with a mini-DIN, then I can build some mini-DIN to 1/4" adapters for patching.

Thanks again

Ryan
 

Sent from my iPhone

On Apr 15, 2013, at 6:44 PM, "Nicholas Keller" <niroke at tampabay.rr.com> wrote:

> I think I've found loads by doing a google search for "panel mount mini
> DIN", the thing is you need to know the actual diameter of the hole on the
> EML-101.  The hole is NOT 1/4" wide if it's a socket for 1/4" jack, as I'm
> sure you know.  
> Here are a few I just looked at....  most require a 13-14mm/.55" hole but
> your EML might be closer to 3/8"
> 
> http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-panel-mo
> unt.html
> http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhead-jac
> k-to-flying-leads-md-4-6-and-8-position-sizes-available
> http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863
> 
> 
> 
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
> Sent: Monday, April 15, 2013 8:48 PM
> To: Dave Brown
> Cc: synth-diy
> Subject: Re: [sdiy] mini-din socket - panel mount?
> 
> Dave and Paul,
> those are DIN not Mini DIN. The following is a Mini din connector:
> http://en.wikipedia.org/wiki/Mini-DIN_connector
> 
> examples include the "small" ps/2 mouse and keyboard connectors (not the
> large ones like for midi), S-Video, and some multi-voltage power supplies.
> 
> Ryan,
> one way to do what you're trying is to use the existing hole to lead the
> cables out into a small box that has the larger connector you'll want to
> use. The box can be out of metal and have a flange integrated into it that
> will screw the small box to the original chassis. This way you can always
> unmod the synth to its original state. The whole contraption can be very
> stable. You'd put a rubber washer around the flange, between the small box
> and the original chassis.
> 
> Cheers,
> D.
> 
> On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
>> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts 
>> list and Mouser numbers are on the page.
>> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>> 
>> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
>> there is a flange on the front that I recessed.  It isn't necessary 
>> but the details will be in my FrontPanelExpress file.  Note that this 
>> connector has threads on the front so you can screw the mini-DIN on 
>> but I have been unable to ever find the mating connector.  I've 
>> written to Mouser with no help but have not tried asking Kobiconn.  
>> The plugs stay inserted but they are a bit loose.
>> 
>> Dave
>> 
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
>> Sent: Monday, April 15, 2013 12:39 PM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: [sdiy] mini-din socket - panel mount?
>> 
>> I'm trying to track down a 5-pin (or greater) mini din socket that can 
>> be panel mounted like a 1/4" with a nut. Does such a product exist? 
>> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
>> in my
>> EML-101 without needing to drill/modify the case.
>> 
>> Tanks in advance
>> 
>> Ryan (p9)
>> 
>> Sent from my iPhone
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>> 
>> 
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From zarquin at ucc.gu.uwa.edu.au  Wed Apr 17 02:53:43 2013
From: zarquin at ucc.gu.uwa.edu.au (Alwyn Lloyd)
Date: Wed, 17 Apr 2013 08:53:43 +0800 (WST)
Subject: [sdiy] FX send /return - wet/dry control operation
In-Reply-To: <CAEaByMQT6NbWqsNL+NMKtbhX_K+JoNyWmAfSMTsatv+1g32JXQ@mail.gmail.com>
References: <516d7c7f.440ab40a.4d3f.3ead@mx.google.com>
	<CAEaByMQT6NbWqsNL+NMKtbhX_K+JoNyWmAfSMTsatv+1g32JXQ@mail.gmail.com>
Message-ID: <alpine.DEB.2.00.1304170824480.25316@mussel.ucc.gu.uwa.edu.au>

On Tue, 16 Apr 2013, Neil Johnson wrote:

> The AUX send on a mixer is send only.  The returns tend to be
> completely separate circuits.  I've only heard of one mixer having a
> wet/dry pot on an insert (useful for per-channel effect) but that was
> a bit of an oddity.
>
> But yes, wet/dry is simply a mix between the raw (dry) and processed
> (wet).  The simplest way to do this is to apply both signals to each
> end of a pot's track, and then the mix comes from the wiper.  There
> are nicer ways to do this of course.

The Pro-Co Juggernaut has a quite elegant way of achieving a wet dry mix.
http://analogguru.an.ohost.de/001/schematics/ProCo_Juggernaut.gif

P4 is the mix control, rather than turning things up, it turns things 
down.

[ZAR]

>
> Neil
>
> On 16 April 2013 17:29, Justin Owen <juzowen at gmail.com> wrote:
>> Bump?
>>
>> :)
>>
>> -----Original Message-----
>> From: Justin Owen [juzowen at gmail.com]
>> Received: 15.04.2013 20:17:07
>> To: SDIY List
>> Subject: FX send /return - wet/dry control operation
>>
>> Hello,
>>
>> Am I right to think that the wet/dry control control on a parallel FX send/return set up (e.g. like the Aux send on a mixer) is basically just a cross-fader type arrangement that increases the level of the wet/return signal while decreasing the level of the dry/original signal (or vice versa)?
>>
>> So - a pot cross-fader in the simplest form or two VCAs for a more exotic number?
>>
>> Thanks,
>>
>> J
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>
>


From patchell at cox.net  Wed Apr 17 06:48:14 2013
From: patchell at cox.net (Jim Patchell)
Date: Tue, 16 Apr 2013 21:48:14 -0700
Subject: [sdiy] google sketchup
Message-ID: <516E298E.3020408@cox.net>

For those who might need a mechanical drawing program, I just started 
using Google Sketchup.  There is a free version that you can download.  
It is fairly easy to use.  I did a drawing of a panel with it pretty 
easily.  I used to use Turbo Cad, or tried to.  I could never get the 
hang of it.

-Jim



From Peter.Ullrich at kapsch.net  Wed Apr 17 07:51:33 2013
From: Peter.Ullrich at kapsch.net (Ullrich Peter)
Date: Wed, 17 Apr 2013 07:51:33 +0200
Subject: [sdiy] google sketchup
In-Reply-To: <516E298E.3020408@cox.net>
References: <516E298E.3020408@cox.net>
Message-ID: <B156A86831A33949A0977840648802478B1BA5AD88@S060VS20.kapsch.co.at>


Hi Jim!

Yes, Google Sketchup is a very nice 3D CAD.
I also started with it a few weeks ago as I want to plan my CNC with it.

Don't forget to have a look at the online library - lots of useful parts can be found there.
Also you are invited each time to give your models on this library for other users.

If you want to design moving parts like robots then there are useful plugins like Sketchup physics 
that can logically join parts.

On the part sector some companies already started to support the Google Sketchup format so that you don't have to
design every small part on your own.

For beginners I recommend the tutorial videos on the Google sketchup site and the are also a lot of
tutorial videos on Youtube. On youtube you can find a lot of special tasks that are not covered by the 
beginner tutorials.

Have fun with Sketchup!

For 3D animations Google sketchup doesn't deliver a good quality.
But you don't have to buy the full version just for this task.
Save the animations as single PNG frames and make the animation out of these single frames with a seperate tool.
Animations in full HD in nice quality are possible this way.
Also static model look very nice if you just go around the object...

Ciao
Peter
________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Jim Patchell [patchell at cox.net]
Gesendet: Mittwoch, 17. April 2013 06:48
An: synth-diy at dropmix.xs4all.nl
Betreff: [sdiy] google sketchup

For those who might need a mechanical drawing program, I just started
using Google Sketchup.  There is a free version that you can download.
It is fairly easy to use.  I did a drawing of a panel with it pretty
easily.  I used to use Turbo Cad, or tried to.  I could never get the
hang of it.

-Jim

_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

The information contained in this e-mail message is privileged and
confidential and is for the exclusive use of the addressee. The person
who receives this message and who is not the addressee, one of his
employees or an agent entitled to hand it over to the addressee, is
informed that he may not use, disclose or reproduce the contents
thereof, and is kindly asked to notify the sender and delete the e-mail
immediately.




From oldcrow at oldcrows.net  Wed Apr 17 08:11:16 2013
From: oldcrow at oldcrows.net (The Old Crow)
Date: Wed, 17 Apr 2013 01:11:16 -0500
Subject: [sdiy] CS VCO and GX1 bandpass boards
Message-ID: <516E3D04.3040208@oldcrows.net>

   Hey folks, Crow here.

   Of all the places to forget to mention it (SDIY), I have bare PC 
boards available for sale for my CS VCO and GX1 bandpass filter. These 
are 110mm x 100mm boards in the MOTM form factor, but can be easily 
adapted to other formats.  For those interested, there is a link at the 
top of http://www.cs80.com/ that points to my web cart.

   Cheers,

Crow
/**/



From barryklein at cox.net  Wed Apr 17 10:19:25 2013
From: barryklein at cox.net (Barry Klein)
Date: Wed, 17 Apr 2013 01:19:25 -0700
Subject: [sdiy] google sketchup
In-Reply-To: <B156A86831A33949A0977840648802478B1BA5AD88@S060VS20.kapsch.co.at>
References: <516E298E.3020408@cox.net>
	<B156A86831A33949A0977840648802478B1BA5AD88@S060VS20.kapsch.co.at>
Message-ID: <000601ce3b44$461fb0e0$d25f12a0$@cox.net>

The first thing I wanted to do when I tried Sketchup was to draw a Clark Y
airfoil.
I couldn't.  I think I needed to buy/load a special add on tool or
something.
I remain frustrated at learning such tools.  Later Google sold it and I
don't know what's happened with it since.

Barry


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Ullrich Peter
Sent: Tuesday, April 16, 2013 22:52
To: Jim Patchell; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] google sketchup


Hi Jim!

Yes, Google Sketchup is a very nice 3D CAD.
I also started with it a few weeks ago as I want to plan my CNC with it.

Don't forget to have a look at the online library - lots of useful parts can
be found there.
Also you are invited each time to give your models on this library for other
users.

If you want to design moving parts like robots then there are useful plugins
like Sketchup physics that can logically join parts.

On the part sector some companies already started to support the Google
Sketchup format so that you don't have to design every small part on your
own.

For beginners I recommend the tutorial videos on the Google sketchup site
and the are also a lot of tutorial videos on Youtube. On youtube you can
find a lot of special tasks that are not covered by the beginner tutorials.

Have fun with Sketchup!

For 3D animations Google sketchup doesn't deliver a good quality.
But you don't have to buy the full version just for this task.
Save the animations as single PNG frames and make the animation out of these
single frames with a seperate tool.
Animations in full HD in nice quality are possible this way.
Also static model look very nice if you just go around the object...

Ciao
Peter
________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl
[synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Jim Patchell
[patchell at cox.net]
Gesendet: Mittwoch, 17. April 2013 06:48
An: synth-diy at dropmix.xs4all.nl
Betreff: [sdiy] google sketchup

For those who might need a mechanical drawing program, I just started using
Google Sketchup.  There is a free version that you can download.
It is fairly easy to use.  I did a drawing of a panel with it pretty easily.
I used to use Turbo Cad, or tried to.  I could never get the hang of it.

-Jim

_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

The information contained in this e-mail message is privileged and
confidential and is for the exclusive use of the addressee. The person who
receives this message and who is not the addressee, one of his employees or
an agent entitled to hand it over to the addressee, is informed that he may
not use, disclose or reproduce the contents thereof, and is kindly asked to
notify the sender and delete the e-mail immediately.


_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From 21pointy at tpg.com.au  Wed Apr 17 11:19:50 2013
From: 21pointy at tpg.com.au (Adam Inglis)
Date: Wed, 17 Apr 2013 19:19:50 +1000
Subject: [sdiy] SDIY Wiki - books
Message-ID: <3466402D-C6B2-463F-9C00-89D5A81CC43B@tpg.com.au>

As a self-taught novice at synth electronics I've appreciated these  
recommendations by the list:

Pease, Robert A. - Troubleshooting Analog Circuits 1991 Elsevier. Paul  
Perry put me on to this, entertaining pearls of wisdom and experience,  
right down to the passive component level.

Lancaster, Don - CMOS Cookbook 2nd Ed 1997 Butterworth Heinemann

Jung, Walter G. - IC Op-Amp Cookbook 1986 Third Ed SAMS. (Apparently  
there are errors in earlier editions?). There is also the spin-off  
"Audio IC Op-Amp Applications" by the same author, and publisher, that  
deals with pre amps, EQs, filters etc

Non-technical but good resources:

Colbeck, Julian - Keyfax Omnibus 1996 MixBooks. Fairly comprehensive  
compendium of reviews of synths, samplers, organs and key controllers,  
from the Farfisa Compact circa mid-sixties, to the mid-nineties. Easy  
and fun to read, and a great reference. Nearly every entry has a B & W  
photo. Also look out for earlier editions from the eighties, where  
more obscure stuff is included. I have Keyfax 2, from 1986.

Vail, Mark - Vintage Synthesizers 1993 Miller Freeman. Another great  
reference.

Moog, Bob et al - Synthesizer Basics 1984 GPI Publications (Hal  
Leonard Pubs). Brilliant collection of articles that first appeared in  
Keyboard Magazine, most of them are by Bob from the late 70s giving  
lucid explanations on topics such as Loudness and Attack Shaping,  
Principles Of Voltage Control, Phasers etc. I got a great trick from  
one of his articles here about synthesizing stereo from a mono source...

Anderton, Craig - Midi For Musicians 1986 AMSCO Pubs. May be  
considered a bit dated now, but enormously helpful to me back in the  
eighties getting my head around midi! The full MIDI spec is in the  
back of the book.


HTH
Adam

p.s. of course, Horowitz and Hill, we are not worthy etc etc


From 21pointy at tpg.com.au  Wed Apr 17 11:37:24 2013
From: 21pointy at tpg.com.au (Adam Inglis)
Date: Wed, 17 Apr 2013 19:37:24 +1000
Subject: [sdiy] CS VCO and GX1 bandpass boards
In-Reply-To: <516E3D04.3040208@oldcrows.net>
References: <516E3D04.3040208@oldcrows.net>
Message-ID: <801558C3-DB39-47CE-806B-5016E8CEEA41@tpg.com.au>

I remember that Gordon Reid article about finding a GX1 that you've  
linked to on your page. It's priceless.

On 17/04/2013, at 4:11 PM, The Old Crow wrote:

>  Hey folks, Crow here.
>
>  Of all the places to forget to mention it (SDIY), I have bare PC  
> boards available for sale for my CS VCO and GX1 bandpass filter.  
> These are 110mm x 100mm boards in the MOTM form factor, but can be  
> easily adapted to other formats.  For those interested, there is a  
> link at the top of http://www.cs80.com/ that points to my web cart.
>
>  Cheers,
>
> Crow
> /**/
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>



From robkam at ymail.com  Wed Apr 17 11:38:21 2013
From: robkam at ymail.com (Rob Kam)
Date: Wed, 17 Apr 2013 10:38:21 +0100
Subject: [sdiy] SDIY Wiki - books
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
Message-ID: <D9FA6CE4BE16479AB919CE53EDF00CCF@kutair>

So far I've been adding links to pages of book reviews on the page 
Bibliography, which kind of overlaps with the page Resources. I've now added 
a Book reviews  page at http://www.sdiy.info/w/Book_reviews

Looking through the archives, will take a lot of time. Here are some
interesting threads on the subject:
2009, May: Subject: [sdiy] good books on electronic music/ electronics 
history?
2009, June July and August: Subject: [sdiy] good books/sites for synth 
electronics
2010, June: Subject: [sdiy] best electronics textbooks 2010, November: 
Subject: [sdiy] Best kept secret of amazing electronics books

I'll try to help if the spam filters get in the way, these might be a bit 
sensitive to new users. Don't worry about making a mess of editing on the 
wiki to begin with, whatever gets put up there is going to get tweaked by 
other users.

Rob

----- Original Message ----- 
From: "cheater00 ." <cheater00 at gmail.com>
To: "synth-diy" <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, April 16, 2013 3:22 PM
Subject: [sdiy] SDIY Wiki - books


Hi guys,
following Rob's recently announced wiki, I thought it would be a good
idea for another round-up of books related to synths, analog design,
and anything else of interest. Please post your suggestions like this:

author - name - short description of why this book is great.

Once this thread gains momentum, someone can go through the whole
thing and add the books to the wiki in an article called "Books"

If you want you can add info about the year or the isbn (isbn is
especially great for obscure books)

Please don't hesitate to re-post books that have been mentioned already.

Maybe someone with a lot of time on their hands can go through the
archives, search for "book" or "books" or "amazon" or "chapter", and
simply round up everything. It would be nice to have such an
aggregation of what books have been mentioned previously.

I hope to kickstart some sort of collaboration and maybe this way we
can start doing more stuff together! That would be really cool..

Cheers,
D.
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From fanwander at mnet-online.de  Wed Apr 17 13:19:51 2013
From: fanwander at mnet-online.de (Florian Anwander)
Date: Wed, 17 Apr 2013 13:19:51 +0200
Subject: [sdiy] FX send /return - wet/dry control operation
In-Reply-To: <alpine.DEB.2.00.1304170824480.25316@mussel.ucc.gu.uwa.edu.au>
References: <516d7c7f.440ab40a.4d3f.3ead@mx.google.com>
	<CAEaByMQT6NbWqsNL+NMKtbhX_K+JoNyWmAfSMTsatv+1g32JXQ@mail.gmail.com>
	<alpine.DEB.2.00.1304170824480.25316@mussel.ucc.gu.uwa.edu.au>
Message-ID: <516E8557.6000400@mnet-online.de>

Hello Alwyn

Am 17.04.2013 02:53, schrieb Alwyn Lloyd:
> http://analogguru.an.ohost.de/001/schematics/ProCo_Juggernaut.gif
>
> P4 is the mix control, rather than turning things up, it turns things down.
This is the inversion of the standard method how a panpot it achieved in 
average mixing consoles.

Example:
http://www.hqew.net/files/Images/Article/Circuit_Diagram/135-af86993780_043290207.gif

Florian


From cheater00 at gmail.com  Wed Apr 17 13:39:48 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Wed, 17 Apr 2013 13:39:48 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <BAY401-EAS222F51E37704405FDCBF2E9E2CD0@phx.gbl>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<BAY401-EAS222F51E37704405FDCBF2E9E2CD0@phx.gbl>
Message-ID: <CA+9GZUiZFZ0qR=3CESYhps9ubi8pzxZOLTDjriPrT9ut7Oph7g@mail.gmail.com>

If you have so many extra outputs to add, why not add a sidecar?

Cheers,
D.

On Tue, Apr 16, 2013 at 10:18 PM, Plutoniq9 ? <plutonique9 at hotmail.com> wrote:
> Thanks all for the input, I'll search the links y'all provided. I'm hoping to not have to modify the case any, I couldn't bring myself to drill through the panel (again).
>
> My plan : Each of the (4) oscillators provide 2-5 waveforms simultaneously, so having direct outs for these would offer some interesting flexibility I'm thinking. If I can replace the current 1/4 output it currently has for each oscillator with a mini-DIN, then I can build some mini-DIN to 1/4" adapters for patching.
>
> Thanks again
>
> Ryan
>
>
> Sent from my iPhone
>
> On Apr 15, 2013, at 6:44 PM, "Nicholas Keller" <niroke at tampabay.rr.com> wrote:
>
>> I think I've found loads by doing a google search for "panel mount mini
>> DIN", the thing is you need to know the actual diameter of the hole on the
>> EML-101.  The hole is NOT 1/4" wide if it's a socket for 1/4" jack, as I'm
>> sure you know.
>> Here are a few I just looked at....  most require a 13-14mm/.55" hole but
>> your EML might be closer to 3/8"
>>
>> http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-panel-mo
>> unt.html
>> http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhead-jac
>> k-to-flying-leads-md-4-6-and-8-position-sizes-available
>> http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863
>>
>>
>>
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
>> Sent: Monday, April 15, 2013 8:48 PM
>> To: Dave Brown
>> Cc: synth-diy
>> Subject: Re: [sdiy] mini-din socket - panel mount?
>>
>> Dave and Paul,
>> those are DIN not Mini DIN. The following is a Mini din connector:
>> http://en.wikipedia.org/wiki/Mini-DIN_connector
>>
>> examples include the "small" ps/2 mouse and keyboard connectors (not the
>> large ones like for midi), S-Video, and some multi-voltage power supplies.
>>
>> Ryan,
>> one way to do what you're trying is to use the existing hole to lead the
>> cables out into a small box that has the larger connector you'll want to
>> use. The box can be out of metal and have a flange integrated into it that
>> will screw the small box to the original chassis. This way you can always
>> unmod the synth to its original state. The whole contraption can be very
>> stable. You'd put a rubber washer around the flange, between the small box
>> and the original chassis.
>>
>> Cheers,
>> D.
>>
>> On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
>>> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The parts
>>> list and Mouser numbers are on the page.
>>> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>>>
>>> The Mouser number is  161-381/4-E.  It takes a fairly large hole and
>>> there is a flange on the front that I recessed.  It isn't necessary
>>> but the details will be in my FrontPanelExpress file.  Note that this
>>> connector has threads on the front so you can screw the mini-DIN on
>>> but I have been unable to ever find the mating connector.  I've
>>> written to Mouser with no help but have not tried asking Kobiconn.
>>> The plugs stay inserted but they are a bit loose.
>>>
>>> Dave
>>>
>>> -----Original Message-----
>>> From: synth-diy-bounces at dropmix.xs4all.nl
>>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
>>> Sent: Monday, April 15, 2013 12:39 PM
>>> To: synth-diy at dropmix.xs4all.nl
>>> Subject: [sdiy] mini-din socket - panel mount?
>>>
>>> I'm trying to track down a 5-pin (or greater) mini din socket that can
>>> be panel mounted like a 1/4" with a nut. Does such a product exist?
>>> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks
>>> in my
>>> EML-101 without needing to drill/modify the case.
>>>
>>> Tanks in advance
>>>
>>> Ryan (p9)
>>>
>>> Sent from my iPhone
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>>>
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From igg.debus at t-online.de  Wed Apr 17 17:36:41 2013
From: igg.debus at t-online.de (Ingo Debus)
Date: Wed, 17 Apr 2013 17:36:41 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>
Message-ID: <CBBDA617-1AD4-4FEB-9FD8-32879D1F76E0@t-online.de>


Am 16.04.2013 um 19:06 schrieb Dave Brown:

>  I keep thinking there may be a
> mini-DIN plug with a locking screw collar but have been unable to find
> anything except a couple of pictures at Finecables.

The WX cable that comes with the Yamaha WX5 Wind Controller has a plug with a screw collar (5 pin mini DIN). I'd love to know where to buy that plug separately.

> I've actually never seen mini-DIN used for MIDI, just the standard 5 pin
> DIN

Well, Yamaha's WX is sort-of MIDI, plus power supply.

Ingo

From tim.parkhurst at gmail.com  Wed Apr 17 18:55:59 2013
From: tim.parkhurst at gmail.com (Tim Parkhurst)
Date: Wed, 17 Apr 2013 09:55:59 -0700
Subject: [sdiy] SDIY Wiki - books
In-Reply-To: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
Message-ID: <CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>

I can add links to the Thomas Henry books I sell, although I don't
have many reviews on them (from the emails I get, people seem to enjoy
them though). I just thought I'd run it by everyone first, as I don't
want to appear too self-serving.


Tim (one serving of Servo is enough) Servo
---
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings



On Tue, Apr 16, 2013 at 7:22 AM, cheater00 . <cheater00 at gmail.com> wrote:
> Hi guys,
> following Rob's recently announced wiki, I thought it would be a good
> idea for another round-up of books related to synths, analog design,
> and anything else of interest. Please post your suggestions like this:
>
> author - name - short description of why this book is great.
>
> Once this thread gains momentum, someone can go through the whole
> thing and add the books to the wiki in an article called "Books"
>
> If you want you can add info about the year or the isbn (isbn is
> especially great for obscure books)
>
> Please don't hesitate to re-post books that have been mentioned already.
>
> Maybe someone with a lot of time on their hands can go through the
> archives, search for "book" or "books" or "amazon" or "chapter", and
> simply round up everything. It would be nice to have such an
> aggregation of what books have been mentioned previously.
>
> I hope to kickstart some sort of collaboration and maybe this way we
> can start doing more stuff together! That would be really cool..
>
> Cheers,
> D.
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From cheater00 at gmail.com  Wed Apr 17 19:45:12 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Wed, 17 Apr 2013 19:45:12 +0200
Subject: [sdiy] SDIY Wiki - books
In-Reply-To: <CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
	<CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>
Message-ID: <CA+9GZUi_jg9BDoRTK_qdoRrCRMwjYPxBz7_MU7moi21GYd=V+w@mail.gmail.com>

No need for long reviews, but something like Adam's short comments
could be nice.

I'd say you can Servo away. And it's my thread and my lawn. ;-)

D.

On Wed, Apr 17, 2013 at 6:55 PM, Tim Parkhurst <tim.parkhurst at gmail.com> wrote:
> I can add links to the Thomas Henry books I sell, although I don't
> have many reviews on them (from the emails I get, people seem to enjoy
> them though). I just thought I'd run it by everyone first, as I don't
> want to appear too self-serving.
>
>
> Tim (one serving of Servo is enough) Servo
> ---
> "Sire, the church of God is an anvil that has worn out many hammers."
> - H.L. Hastings
>
>
>
> On Tue, Apr 16, 2013 at 7:22 AM, cheater00 . <cheater00 at gmail.com> wrote:
>> Hi guys,
>> following Rob's recently announced wiki, I thought it would be a good
>> idea for another round-up of books related to synths, analog design,
>> and anything else of interest. Please post your suggestions like this:
>>
>> author - name - short description of why this book is great.
>>
>> Once this thread gains momentum, someone can go through the whole
>> thing and add the books to the wiki in an article called "Books"
>>
>> If you want you can add info about the year or the isbn (isbn is
>> especially great for obscure books)
>>
>> Please don't hesitate to re-post books that have been mentioned already.
>>
>> Maybe someone with a lot of time on their hands can go through the
>> archives, search for "book" or "books" or "amazon" or "chapter", and
>> simply round up everything. It would be nice to have such an
>> aggregation of what books have been mentioned previously.
>>
>> I hope to kickstart some sort of collaboration and maybe this way we
>> can start doing more stuff together! That would be really cool..
>>
>> Cheers,
>> D.
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From robkam at ymail.com  Wed Apr 17 20:09:35 2013
From: robkam at ymail.com (Rob Kam)
Date: Wed, 17 Apr 2013 19:09:35 +0100 (BST)
Subject: [sdiy] SDIY Wiki - books
In-Reply-To: <CA+9GZUi_jg9BDoRTK_qdoRrCRMwjYPxBz7_MU7moi21GYd=V+w@mail.gmail.com>
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
	<CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>
	<CA+9GZUi_jg9BDoRTK_qdoRrCRMwjYPxBz7_MU7moi21GYd=V+w@mail.gmail.com>
Message-ID: <1366222175.20030.YahooMailNeo@web172501.mail.ir2.yahoo.com>

The site won't let you add a link without having first done some other edits.?

Rob?


----- Original Message -----
> From: cheater00 . <cheater00 at gmail.com>
> To: Tim Parkhurst <tim.parkhurst at gmail.com>
> Cc: synth-diy <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, 17 April 2013, 18:45
> Subject: Re: [sdiy] SDIY Wiki - books
> 
> No need for long reviews, but something like Adam's short comments
> could be nice.
> 
> I'd say you can Servo away. And it's my thread and my lawn. ;-)
> 
> D.
> 
> On Wed, Apr 17, 2013 at 6:55 PM, Tim Parkhurst <tim.parkhurst at gmail.com> 
> wrote:
>>  I can add links to the Thomas Henry books I sell, although I don't
>>  have many reviews on them (from the emails I get, people seem to enjoy
>>  them though). I just thought I'd run it by everyone first, as I 
> don't
>>  want to appear too self-serving.
>> 
>> 
>>  Tim (one serving of Servo is enough) Servo
>>  ---
>>  "Sire, the church of God is an anvil that has worn out many 
> hammers."
>>  - H.L. Hastings
>> 
>> 
>> 
>>  On Tue, Apr 16, 2013 at 7:22 AM, cheater00 . <cheater00 at gmail.com> 
> wrote:
>>>  Hi guys,
>>>  following Rob's recently announced wiki, I thought it would be a 
> good
>>>  idea for another round-up of books related to synths, analog design,
>>>  and anything else of interest. Please post your suggestions like this:
>>> 
>>>  author - name - short description of why this book is great.
>>> 
>>>  Once this thread gains momentum, someone can go through the whole
>>>  thing and add the books to the wiki in an article called 
> "Books"
>>> 
>>>  If you want you can add info about the year or the isbn (isbn is
>>>  especially great for obscure books)
>>> 
>>>  Please don't hesitate to re-post books that have been mentioned 
> already.
>>> 
>>>  Maybe someone with a lot of time on their hands can go through the
>>>  archives, search for "book" or "books" or 
> "amazon" or "chapter", and
>>>  simply round up everything. It would be nice to have such an
>>>  aggregation of what books have been mentioned previously.
>>> 
>>>  I hope to kickstart some sort of collaboration and maybe this way we
>>>  can start doing more stuff together! That would be really cool..
>>> 
>>>  Cheers,
>>>  D.
>>>  _______________________________________________
>>>  Synth-diy mailing list
>>>  Synth-diy at dropmix.xs4all.nl
>>>  http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 


From mars at pingdynasty.com  Wed Apr 17 20:45:58 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Wed, 17 Apr 2013 19:45:58 +0100
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <CBBDA617-1AD4-4FEB-9FD8-32879D1F76E0@t-online.de>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>
	<CBBDA617-1AD4-4FEB-9FD8-32879D1F76E0@t-online.de>
Message-ID: <01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>


On 17 Apr 2013, at 16:36, Ingo Debus wrote:

> The WX cable that comes with the Yamaha WX5 Wind Controller has a plug with a screw collar (5 pin mini DIN). I'd love to know where to buy that plug separately.

If it is the same as the WX11 then it fits a standard 6-pin mini-din socket, but the bayonet locking collar is probably unique.

>> I've actually never seen mini-DIN used for MIDI, just the standard 5 pin
>> DIN
> 
> Well, Yamaha's WX is sort-of MIDI, plus power supply.

do you know the pin-out?

best,

Martin

From paul at fitvideo.co.uk  Wed Apr 17 21:21:43 2013
From: paul at fitvideo.co.uk (Paul Burns)
Date: Wed, 17 Apr 2013 20:21:43 +0100
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>	<000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>	<CBBDA617-1AD4-4FEB-9FD8-32879D1F76E0@t-online.de>
	<01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>
Message-ID: <000001ce3ba0$d3456670$79d03350$@fitvideo.co.uk>

"I've actually never seen mini-DIN used for MIDI, just the standard 5 
pin DIN"
There was a Creative card (early Audigy? Possibly earlier? ) that had two
mini 5 pin DIN sockets on , and came with two short full sized to mini
cables. So they were PCB mounted through bracket.

regards


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Martin Klang
Sent: 17 April 2013 19:46
To: Ingo Debus
Cc: Synth-Diy DIY
Subject: Re: [sdiy] mini-din socket - panel mount?


On 17 Apr 2013, at 16:36, Ingo Debus wrote:

> The WX cable that comes with the Yamaha WX5 Wind Controller has a plug
with a screw collar (5 pin mini DIN). I'd love to know where to buy that
plug separately.

If it is the same as the WX11 then it fits a standard 6-pin mini-din socket,
but the bayonet locking collar is probably unique.

>> I've actually never seen mini-DIN used for MIDI, just the standard 5 
>> pin DIN
> 
> Well, Yamaha's WX is sort-of MIDI, plus power supply.

do you know the pin-out?

best,

Martin
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From davebr at earthlink.net  Wed Apr 17 21:29:31 2013
From: davebr at earthlink.net (Dave Brown)
Date: Wed, 17 Apr 2013 12:29:31 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <000001ce3ba0$d3456670$79d03350$@fitvideo.co.uk>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>	<000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>	<CBBDA617-1AD4-4FEB-9FD8-32879D1F76E0@t-online.de>	<01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>
	<000001ce3ba0$d3456670$79d03350$@fitvideo.co.uk>
Message-ID: <001b01ce3ba1$e3751e40$aa5f5ac0$@earthlink.net>

My Tenori-On actually has a 6 pin mini-DIN connector with a pigtail that
fans it out to a standard 5 pin DIN MIDI in and out so I guess I have seen
one.

Dave

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Paul Burns
Sent: Wednesday, April 17, 2013 12:22 PM
To: 'Martin Klang'; 'Ingo Debus'
Cc: 'Synth-Diy DIY'
Subject: Re: [sdiy] mini-din socket - panel mount?

"I've actually never seen mini-DIN used for MIDI, just the standard 5 pin
DIN"
There was a Creative card (early Audigy? Possibly earlier? ) that had two
mini 5 pin DIN sockets on , and came with two short full sized to mini
cables. So they were PCB mounted through bracket.

regards


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Martin Klang
Sent: 17 April 2013 19:46
To: Ingo Debus
Cc: Synth-Diy DIY
Subject: Re: [sdiy] mini-din socket - panel mount?


On 17 Apr 2013, at 16:36, Ingo Debus wrote:

> The WX cable that comes with the Yamaha WX5 Wind Controller has a plug
with a screw collar (5 pin mini DIN). I'd love to know where to buy that
plug separately.

If it is the same as the WX11 then it fits a standard 6-pin mini-din socket,
but the bayonet locking collar is probably unique.

>> I've actually never seen mini-DIN used for MIDI, just the standard 5 
>> pin DIN
> 
> Well, Yamaha's WX is sort-of MIDI, plus power supply.

do you know the pin-out?

best,

Martin
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy




From tim.parkhurst at gmail.com  Wed Apr 17 21:35:40 2013
From: tim.parkhurst at gmail.com (Tim Parkhurst)
Date: Wed, 17 Apr 2013 12:35:40 -0700
Subject: [sdiy] For sale (again): SE-1X and Blofeld Desktop
Message-ID: <CACDGQT8xZdRrp9jmOw_+UwUUWkksgW4dZ6_ag-WkRzxc1a0RgQ@mail.gmail.com>

Okay, so I was asking a bit high for these last time, so I'll try again.

SE-1X - Blue, in great shape. A few very minor nicks, but only
noticeable upon close inspection. A great sounding synth! Looking for
$800 + shipping.

Blofeld Desktop - White, also in great shape. I like this synth, and
the range of sounds available is amazing. One of the little rubber
feet on the bottom is missing, but otherwise looks and sounds great.
$300 + shipping.

Pics available upon request.


Tim (bargains? I got your bargains) Servo
---
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings


From Stromeko at nexgo.de  Wed Apr 17 22:04:55 2013
From: Stromeko at nexgo.de (ASSI)
Date: Wed, 17 Apr 2013 22:04:55 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <000001ce3ba0$d3456670$79d03350$@fitvideo.co.uk>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>
	<000001ce3ba0$d3456670$79d03350$@fitvideo.co.uk>
Message-ID: <2283253.ClD2mG9uvq@rainer.invalid>

On Wednesday 17 April 2013, 20:21:43, Paul Burns wrote:
> There was a Creative card (early Audigy? Possibly earlier? ) that had two
> mini 5 pin DIN sockets on , and came with two short full sized to mini
> cables. So they were PCB mounted through bracket.

Earlier, I still have these connected to my SB Live! (they are PCB mounted, 
but not fastened to the bracket).  The AWE32 (or at least some variants of 
it) had the DB15 connector that is still used for Game/Joystick/MIDI on some 
motherboards.

The other Mini-DIN connector was for the To-Host interface that Yamaha was 
peddling for a while.  I think this must have been a 6-pin (like PS/2) 
variant, since it was supposed to be directly compatible with the Mac serial 
port via standard cable and there were also cables to connect directly to a 
PC serial port (DB9).


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

SD adaptation for Waldorf Blofeld V1.15B11:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada



From davebr at earthlink.net  Wed Apr 17 22:19:06 2013
From: davebr at earthlink.net (Dave Brown)
Date: Wed, 17 Apr 2013 13:19:06 -0700
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <BAY401-EAS222F51E37704405FDCBF2E9E2CD0@phx.gbl>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>
	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<BAY401-EAS222F51E37704405FDCBF2E9E2CD0@phx.gbl>
Message-ID: <000301ce3ba8$d0672c10$71358430$@earthlink.net>

A  Mouser 571-1838838-2 is a M8 panel connector which is 4 conductors.  I've
never used one but the mounting hole is 8.1mm or 0.319", just slightly
smaller than the 0.375" hole for the 1/4" jack.  The mating plug is
571-1838288-3 has a cable attached.  They're not cheap. 

I can't tell whether there is a ground shield or not but if you are in the
same synth cabinet then you could use all four pins for signals.  Just a
thought and they will fit up to a 3mm panel.  There may be other M8
connectors that would work better.

Dave


-----Original Message-----
From: Plutoniq9 . [mailto:plutonique9 at hotmail.com] 
Sent: Tuesday, April 16, 2013 1:18 PM
To: Nicholas Keller
Cc: cheater00 .; Dave Brown; synth-diy
Subject: Re: [sdiy] mini-din socket - panel mount?

Thanks all for the input, I'll search the links y'all provided. I'm hoping
to not have to modify the case any, I couldn't bring myself to drill through
the panel (again).

My plan : Each of the (4) oscillators provide 2-5 waveforms simultaneously,
so having direct outs for these would offer some interesting flexibility I'm
thinking. If I can replace the current 1/4 output it currently has for each
oscillator with a mini-DIN, then I can build some mini-DIN to 1/4" adapters
for patching.

Thanks again

Ryan
 

Sent from my iPhone

On Apr 15, 2013, at 6:44 PM, "Nicholas Keller" <niroke at tampabay.rr.com>
wrote:

> I think I've found loads by doing a google search for "panel mount 
> mini DIN", the thing is you need to know the actual diameter of the 
> hole on the EML-101.  The hole is NOT 1/4" wide if it's a socket for 
> 1/4" jack, as I'm sure you know.
> Here are a few I just looked at....  most require a 13-14mm/.55" hole 
> but your EML might be closer to 3/8"
> 
> http://www.jameco.com/1/1/842-mdpm6-mdp-socket-mini-din-female-6pin-pa
> nel-mo
> unt.html
> http://www.l-com.com/firewire-din-scsi-sata-mini-din-rear-mount-bulkhe
> ad-jac k-to-flying-leads-md-4-6-and-8-position-sizes-available
> http://www.digikey.com/product-detail/en/MD-60CV/CP-2860-ND/352863
> 
> 
> 
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater00 .
> Sent: Monday, April 15, 2013 8:48 PM
> To: Dave Brown
> Cc: synth-diy
> Subject: Re: [sdiy] mini-din socket - panel mount?
> 
> Dave and Paul,
> those are DIN not Mini DIN. The following is a Mini din connector:
> http://en.wikipedia.org/wiki/Mini-DIN_connector
> 
> examples include the "small" ps/2 mouse and keyboard connectors (not 
> the large ones like for midi), S-Video, and some multi-voltage power
supplies.
> 
> Ryan,
> one way to do what you're trying is to use the existing hole to lead 
> the cables out into a small box that has the larger connector you'll 
> want to use. The box can be out of metal and have a flange integrated 
> into it that will screw the small box to the original chassis. This 
> way you can always unmod the synth to its original state. The whole 
> contraption can be very stable. You'd put a rubber washer around the 
> flange, between the small box and the original chassis.
> 
> Cheers,
> D.
> 
> On Mon, Apr 15, 2013 at 9:50 PM, Dave Brown <davebr at earthlink.net> wrote:
>> I used a 4 pin mini-DIN on my ComputerVoltageSource module.  The 
>> parts list and Mouser numbers are on the page.
>> http://modularsynthesis.com/cvs/DJB_CVS_2-17-08_documentation.pdf
>> 
>> The Mouser number is  161-381/4-E.  It takes a fairly large hole and 
>> there is a flange on the front that I recessed.  It isn't necessary 
>> but the details will be in my FrontPanelExpress file.  Note that this 
>> connector has threads on the front so you can screw the mini-DIN on 
>> but I have been unable to ever find the mating connector.  I've 
>> written to Mouser with no help but have not tried asking Kobiconn.
>> The plugs stay inserted but they are a bit loose.
>> 
>> Dave
>> 
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Plutoniq9 .
>> Sent: Monday, April 15, 2013 12:39 PM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: [sdiy] mini-din socket - panel mount?
>> 
>> I'm trying to track down a 5-pin (or greater) mini din socket that 
>> can be panel mounted like a 1/4" with a nut. Does such a product exist?
>> The footprint is hopefully 1/4" or smaller to replace mono 1/4" jacks 
>> in my
>> EML-101 without needing to drill/modify the case.
>> 
>> Tanks in advance
>> 
>> Ryan (p9)
>> 
>> Sent from my iPhone
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>> 
>> 
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy




From tim.parkhurst at gmail.com  Wed Apr 17 22:56:28 2013
From: tim.parkhurst at gmail.com (Tim Parkhurst)
Date: Wed, 17 Apr 2013 13:56:28 -0700
Subject: [sdiy] For sale (again): SE-1X and Blofeld Desktop
In-Reply-To: <CACDGQT8xZdRrp9jmOw_+UwUUWkksgW4dZ6_ag-WkRzxc1a0RgQ@mail.gmail.com>
References: <CACDGQT8xZdRrp9jmOw_+UwUUWkksgW4dZ6_ag-WkRzxc1a0RgQ@mail.gmail.com>
Message-ID: <CACDGQT-eDPP7c8wQh9GrntrCgmDbVuXpLHnfz=7r9yfNQpymDA@mail.gmail.com>

Oops, forgot to mention I'm in northern California, near Palo Alto.


Tim (location is everything) Servo
---
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings


On Wed, Apr 17, 2013 at 12:35 PM, Tim Parkhurst <tim.parkhurst at gmail.com> wrote:
> Okay, so I was asking a bit high for these last time, so I'll try again.
>
> SE-1X - Blue, in great shape. A few very minor nicks, but only
> noticeable upon close inspection. A great sounding synth! Looking for
> $800 + shipping.
>
> Blofeld Desktop - White, also in great shape. I like this synth, and
> the range of sounds available is amazing. One of the little rubber
> feet on the bottom is missing, but otherwise looks and sounds great.
> $300 + shipping.
>
> Pics available upon request.
>
>
> Tim (bargains? I got your bargains) Servo
> ---
> "Sire, the church of God is an anvil that has worn out many hammers."
> - H.L. Hastings


From cheater00 at gmail.com  Wed Apr 17 22:59:15 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Wed, 17 Apr 2013 22:59:15 +0200
Subject: [sdiy] SDIY Wiki - books
In-Reply-To: <1366222175.20030.YahooMailNeo@web172501.mail.ir2.yahoo.com>
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
	<CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>
	<CA+9GZUi_jg9BDoRTK_qdoRrCRMwjYPxBz7_MU7moi21GYd=V+w@mail.gmail.com>
	<1366222175.20030.YahooMailNeo@web172501.mail.ir2.yahoo.com>
Message-ID: <CA+9GZUiH9qinpS_pZfj1-+XPf72wdBySXw5ggs7rGXb0Km4pPQ@mail.gmail.com>

Hey Rob,
let's worry about the technicalities when we get there.. it's enough
if someone posts links in this thread here.

Cheers,
D.

On Wed, Apr 17, 2013 at 8:09 PM, Rob Kam <robkam at ymail.com> wrote:
> The site won't let you add a link without having first done some other edits.
>
> Rob
>
>
> ----- Original Message -----
>> From: cheater00 . <cheater00 at gmail.com>
>> To: Tim Parkhurst <tim.parkhurst at gmail.com>
>> Cc: synth-diy <synth-diy at dropmix.xs4all.nl>
>> Sent: Wednesday, 17 April 2013, 18:45
>> Subject: Re: [sdiy] SDIY Wiki - books
>>
>> No need for long reviews, but something like Adam's short comments
>> could be nice.
>>
>> I'd say you can Servo away. And it's my thread and my lawn. ;-)
>>
>> D.
>>
>> On Wed, Apr 17, 2013 at 6:55 PM, Tim Parkhurst <tim.parkhurst at gmail.com>
>> wrote:
>>>  I can add links to the Thomas Henry books I sell, although I don't
>>>  have many reviews on them (from the emails I get, people seem to enjoy
>>>  them though). I just thought I'd run it by everyone first, as I
>> don't
>>>  want to appear too self-serving.
>>>
>>>
>>>  Tim (one serving of Servo is enough) Servo
>>>  ---
>>>  "Sire, the church of God is an anvil that has worn out many
>> hammers."
>>>  - H.L. Hastings
>>>
>>>
>>>
>>>  On Tue, Apr 16, 2013 at 7:22 AM, cheater00 . <cheater00 at gmail.com>
>> wrote:
>>>>  Hi guys,
>>>>  following Rob's recently announced wiki, I thought it would be a
>> good
>>>>  idea for another round-up of books related to synths, analog design,
>>>>  and anything else of interest. Please post your suggestions like this:
>>>>
>>>>  author - name - short description of why this book is great.
>>>>
>>>>  Once this thread gains momentum, someone can go through the whole
>>>>  thing and add the books to the wiki in an article called
>> "Books"
>>>>
>>>>  If you want you can add info about the year or the isbn (isbn is
>>>>  especially great for obscure books)
>>>>
>>>>  Please don't hesitate to re-post books that have been mentioned
>> already.
>>>>
>>>>  Maybe someone with a lot of time on their hands can go through the
>>>>  archives, search for "book" or "books" or
>> "amazon" or "chapter", and
>>>>  simply round up everything. It would be nice to have such an
>>>>  aggregation of what books have been mentioned previously.
>>>>
>>>>  I hope to kickstart some sort of collaboration and maybe this way we
>>>>  can start doing more stuff together! That would be really cool..
>>>>
>>>>  Cheers,
>>>>  D.
>>>>  _______________________________________________
>>>>  Synth-diy mailing list
>>>>  Synth-diy at dropmix.xs4all.nl
>>>>  http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>


From tim.parkhurst at gmail.com  Thu Apr 18 01:26:23 2013
From: tim.parkhurst at gmail.com (Tim Parkhurst)
Date: Wed, 17 Apr 2013 16:26:23 -0700
Subject: [sdiy] For sale (again): SE-1X and Blofeld Desktop
In-Reply-To: <CACDGQT8xZdRrp9jmOw_+UwUUWkksgW4dZ6_ag-WkRzxc1a0RgQ@mail.gmail.com>
References: <CACDGQT8xZdRrp9jmOw_+UwUUWkksgW4dZ6_ag-WkRzxc1a0RgQ@mail.gmail.com>
Message-ID: <CACDGQT-9rD8bSHW_KunfZ_BWQ5=EKVEdu-ha_UYoPvAmuv6Cmw@mail.gmail.com>

The Blofeld is sold (that went fast!) but the SE-1X is still waiting
for a good home.


Tim (I still think more synths should be named after James bond villains) Servo
---
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings


On Wed, Apr 17, 2013 at 12:35 PM, Tim Parkhurst <tim.parkhurst at gmail.com> wrote:
> Okay, so I was asking a bit high for these last time, so I'll try again.
>
> SE-1X - Blue, in great shape. A few very minor nicks, but only
> noticeable upon close inspection. A great sounding synth! Looking for
> $800 + shipping.
>
> Blofeld Desktop - White, also in great shape. I like this synth, and
> the range of sounds available is amazing. One of the little rubber
> feet on the bottom is missing, but otherwise looks and sounds great.
> $300 + shipping.
>
> Pics available upon request.
>
>
> Tim (bargains? I got your bargains) Servo
> ---
> "Sire, the church of God is an anvil that has worn out many hammers."
> - H.L. Hastings


From sounddoctorin at imt.net  Thu Apr 18 04:22:34 2013
From: sounddoctorin at imt.net (Bob Weigel)
Date: Wed, 17 Apr 2013 20:22:34 -0600
Subject: [sdiy] prophet 2000 disk image anyone?
Message-ID: <516F58EA.4070106@imt.net>

I'm trying to test a disk drive before I send it to make sure it really 
works in a P2000. I have one here that had a bad disk I think.  I got 
some kind of floppy I thought that had a disk image on it for it.  It 
says 'nd both with original and with the Teac drive I bought for it AND 
the one I know is good I took out of DSS-1 I upgraded.

The jumpers are set different though.  Has anyone been down either the 
road of setting jumpers for that machine or does anyone have a disk 
image file they can send for P2000?

-- 
Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!



From steve at bendentech.co.uk  Thu Apr 18 10:46:02 2013
From: steve at bendentech.co.uk (Steve Lenham)
Date: Thu, 18 Apr 2013 09:46:02 +0100
Subject: [sdiy] prophet 2000 disk image anyone?
In-Reply-To: <516F58EA.4070106@imt.net>
References: <516F58EA.4070106@imt.net>
Message-ID: <516FB2CA.4010503@bendentech.co.uk>

On 18/04/2013 03:22, Bob Weigel wrote:
> I'm trying to test a disk drive before I send it to make sure it really
> works in a P2000. I have one here that had a bad disk I think.  I got
> some kind of floppy I thought that had a disk image on it for it.  It
> says 'nd both with original and with the Teac drive I bought for it AND
> the one I know is good I took out of DSS-1 I upgraded.
>
> The jumpers are set different though.  Has anyone been down either the
> road of setting jumpers for that machine or does anyone have a disk
> image file they can send for P2000?
>

Hi Bob,

The P2000 is hard-wired to use the Drive Select 0 signal (DS0 - pin 10 
on the ribbon) to enable the floppy drive, but many drives come 
preconfigured to use Drive Select 1 (DS1 - pin 12). You need to check 
and, if necessary, swap over the select line - it might be a movable 
jumper or a solder link.

Certainly all the drives in the common Teac FD235 series appear to use 
DS1 as the factory default. I suspect this may have got a lot of drives 
written off as incompatible with the P2000! I successfully used an 
FD235HF-A291 mechanism in a P2000 once the solder jumper had been 
reconfigured.

Hope this helps!

Steve L.

Steve Lenham
Benden Sound Technology
www.bendensound.co.uk


From igg.debus at t-online.de  Thu Apr 18 17:58:53 2013
From: igg.debus at t-online.de (Ingo Debus)
Date: Thu, 18 Apr 2013 17:58:53 +0200
Subject: [sdiy] mini-din socket - panel mount?
In-Reply-To: <01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>
References: <BAY401-EAS4455C4C2B1581026399D021E2CC0@phx.gbl>	<001101ce3a12$6b853f40$428fbdc0$@earthlink.net>
	<CA+9GZUjoMFQy=qPPug=gupeGxzme9mtFp6gNistohixdQLGj7w@mail.gmail.com>
	<005101ce3a43$83cf64f0$8b6e2ed0$@rr.com>
	<000601ce3ac4$cc23c3a0$646b4ae0$@earthlink.net>
	<CBBDA617-1AD4-4FEB-9FD8-32879D1F76E0@t-online.de>
	<01F9C5C9-0781-4003-8E35-050CB9A7E635@pingdynasty.com>
Message-ID: <01D94DE1-892F-4567-BD75-17A22A7B9019@t-online.de>


Am 17.04.2013 um 20:45 schrieb Martin Klang:

> 
> If it is the same as the WX11 then it fits a standard 6-pin mini-din socket, but the bayonet locking collar is probably unique.

Are you sure it's 6 pins? It would be incompatible to other Yamaha gear then (VL70-m etc.).


>>> I've actually never seen mini-DIN used for MIDI, just the standard 5 pin
>>> DIN
>> 
>> Well, Yamaha's WX is sort-of MIDI, plus power supply.
> 
> do you know the pin-out?

1: no connection
2: MIDI (there's no current limiting resistor, just a tranny to gnd in the WX5)
3: Ground
4: Ground (no connection in the VL70-m)
5: +9V
The shield is connected to +9V!

Ingo

From sounddoctorin at imt.net  Thu Apr 18 22:31:59 2013
From: sounddoctorin at imt.net (Bob Weigel)
Date: Thu, 18 Apr 2013 14:31:59 -0600
Subject: [sdiy] prophet 2000 disk image anyone?
In-Reply-To: <516FB2CA.4010503@bendentech.co.uk>
References: <516F58EA.4070106@imt.net> <516FB2CA.4010503@bendentech.co.uk>
Message-ID: <5170583F.5010602@imt.net>

On 4/18/2013 2:46 AM, Steve Lenham wrote:
> On 18/04/2013 03:22, Bob Weigel wrote:
>> I'm trying to test a disk drive before I send it to make sure it really
>> works in a P2000. I have one here that had a bad disk I think.  I got
>> some kind of floppy I thought that had a disk image on it for it.  It
>> says 'nd both with original and with the Teac drive I bought for it AND
>> the one I know is good I took out of DSS-1 I upgraded.
>>
>> The jumpers are set different though.  Has anyone been down either the
>> road of setting jumpers for that machine or does anyone have a disk
>> image file they can send for P2000?
>>
>
> Hi Bob,
>
> The P2000 is hard-wired to use the Drive Select 0 signal (DS0 - pin 10 
> on the ribbon) to enable the floppy drive, but many drives come 
> preconfigured to use Drive Select 1 (DS1 - pin 12). You need to check 
> and, if necessary, swap over the select line - it might be a movable 
> jumper or a solder link.
>
> Certainly all the drives in the common Teac FD235 series appear to use 
> DS1 as the factory default. I suspect this may have got a lot of 
> drives written off as incompatible with the P2000! I successfully used 
> an FD235HF-A291 mechanism in a P2000 once the solder jumper had been 
> reconfigured.
>
> Hope this helps!
>
> Steve L.
>
> Steve Lenham
> Benden Sound Technology
> www.bendensound.co.uk
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
The DSS-1 apparently was also ds0 set already as was the other I had 
gotten somewhere.  One which I see wasn't an a529 version ..   but 
anyway that one (the korg) had settings for RY34 (READY output on pin 
34), HA (density set automatically), REN (enable auto-recalibration) and 
IR (LED on:drive select * ready)

The other drive I think added HD2 (HD output on pin 2).  Other jumpers 
that are available but not used on either include Disable auto-chucking 
(typo?),  disk change output on pin34, disk change output on pin 2,  
Density set by HD IN on pin 2 and FG a short between FDD Frame and DC 0V...



-- 
Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!



From jpdesroc at oricom.ca  Fri Apr 19 20:51:51 2013
From: jpdesroc at oricom.ca (Jean-Pierre Desrochers)
Date: Fri, 19 Apr 2013 14:51:51 -0400
Subject: [sdiy] Seeking for a vintage Traynor 12/201 mixer schematic...
Message-ID: <dfe0002e9739871b51e8d5a13ee32661@oricom.ca>

I know this topic is outside DIY synth stuff but
I wondered if anybody would know where I could find
a PDF schematic of an old Traynor 12/201 mixer like this one:

http://www.biggerbids.com/auction-image-gallery.php?ig=1&auction_id=377988&image_id=2262851

I called Traynor support and they gently searched
in their files but nothing...
The only thing they found for me was that
the schematic I'm looking for is for 12/201 and 16/201 mixers
which are from the same series...

Any clue ?
JP


From grant at musictechnologiesgroup.com  Fri Apr 19 21:06:24 2013
From: grant at musictechnologiesgroup.com (MTG)
Date: Fri, 19 Apr 2013 12:06:24 -0700
Subject: [sdiy] Seeking for a vintage Traynor 12/201 mixer schematic...
In-Reply-To: <dfe0002e9739871b51e8d5a13ee32661@oricom.ca>
References: <dfe0002e9739871b51e8d5a13ee32661@oricom.ca>
Message-ID: <517195B0.1070903@musictechnologiesgroup.com>

Try a tech at (a local) Long & McQuade.

GB

On 4/19/2013 11:51 AM, Jean-Pierre Desrochers wrote:
> I know this topic is outside DIY synth stuff but
> I wondered if anybody would know where I could find
> a PDF schematic of an old Traynor 12/201 mixer like this one:
>
> http://www.biggerbids.com/auction-image-gallery.php?ig=1&auction_id=377988&image_id=2262851 
>
>
> I called Traynor support and they gently searched
> in their files but nothing...
> The only thing they found for me was that
> the schematic I'm looking for is for 12/201 and 16/201 mixers
> which are from the same series...
>
> Any clue ?
> JP
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>



From 21pointy at tpg.com.au  Sun Apr 21 07:51:57 2013
From: 21pointy at tpg.com.au (Adam Inglis)
Date: Sun, 21 Apr 2013 15:51:57 +1000
Subject: [sdiy] Smart FSK specs
In-Reply-To: <59B1EE78-1882-419F-804A-B0526285B06D@tpg.com.au>
References: <59B1EE78-1882-419F-804A-B0526285B06D@tpg.com.au>
Message-ID: <32647239-4EFA-4395-9BDB-D7D9600FB9C2@tpg.com.au>


On 14/04/2013, at 10:35 AM, Adam Inglis wrote:

> I wonder if anyone can point me to some info regarding the specs of  
> Smart FSK? There doen't seem much out there that I can find -  
> specifically I'm trying to understand how Song Position Pointer info  
> is embedded in the pulse stream.
>
> For a few years now I've been using a system in my studio where I  
> synthesize regular FSK using a soft synth in Ableton Live, and send  
> this audio out on a dedicated channel to the Tape Sync input of my  
> hardware midi sequencer (Roland MC50mkII),  locking it to the DAW.
> (Alongside this is a second audio track driving an Innerclock Sync  
> Lock using a similar principle, thus relieving the DAW of any clock  
> or midi duties, resulting in impeccable timing sync. Details are on  
> my webpage:
> http://www.adambaby.com/studiotech_sync.html    )
>
> Generating regular FSK is simple - its just alternating tones an  
> octave apart at 24 PPQN, same resolution as midi and Roland DIN  
> sync. The tones frequencies roughly correspond to midi notes D6 and  
> D7.
> I'm wondering, and this may be quite naive, if it also possible to  
> synthesize "Smart" FSK, so that the hardware could chase a linear  
> arrangement started at any point in the song. Of course, the speed  
> of the pulses may well push it beyond the capabilities of a midi  
> file driving a soft synth.
>
>
> Any info welcome!
> Adam




OK, so I've managed to get this working.

The midi spec for Song Position Pointer (SPP) says that it is a 3 byte  
message, a status byte followed by 2 data bytes.The data bytes are  
basically a 14 bit counter that counts "1" for every sixteenth note  
that has passed since the start of the song. Once a machine has  
received and recognized a SPP message, it then begins to count midi  
clocks from that point. It doesn't continue to process SPP.
At the resolution of midi clock (24PPQN), a sixteenth note is  
represented by 6 clocks. (I'm not sure how a 14 bit counter can be  
represented by 6 pulses)

Looking at the waveform of Smart FSK, I noticed that the high  
frequency pulses were different to that of regular FSK. In FSK they  
are all of equal duration, in Smart FSK there are short ones and  
longer ones, but their leading edges are all still regularly spaced as  
in FSK.
So, the timing pulses also actually contain a binary code.
Since I had no way of knowing how Roland implemented this code in the  
pulse-generating/pulse-reading hardware in the MC50, I transcribed the  
pulses from a couple of bars onto paper, made an eyeball guess at the  
mark:space ratios, then wrote a midi file to mimic the pulses with  
notes, as I've been doing with FSK. In this case the short notes had a  
resolution of a 512th triplet note!

Well, it worked. The MC50 chased Live and locked on within a bar or  
less, at the correct position in the song.

Now of course, it would be really tedious to have to manually write  
every bar for a whole song, although once done you could save it as a  
midi file and use it as a template. What I'm doing for the present is  
just writing say seven or eight sections spread out over the song,  
interspersed with regular FSK, to allow me to skip around a track  
fairly quickly. There seem to be a few quirks and caveats that I will  
explore and document in time.

Messing around with this kind of audio-based sync has got me thinking.  
There seems to be a resurgence of hardware boxes such as sequencers  
and drum machines, and gradually also, an awareness of the  
deficiencies in midi timing.
We might start seeing more of this kind of interface reappearing on  
hardware in the future. Obviously Innerclock Systems are ahead of the  
curve here, with their Sync Gen products. Interesting also that Korg  
have an audio-based sync system for their monotribes and new Volca  
range. The extra sophistication that something like Smart FSK offers  
could help make the DAW<->hardware workflow experience seamless.

(For any one interested I hope to have an Ableton template set up on  
my website soon. I might put up the basic midi files as well, but I  
have found that not all platforms can properly reproduce a midi file  
with such minutely short notes)

Adam


From cheater00 at gmail.com  Mon Apr 22 19:07:08 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Mon, 22 Apr 2013 19:07:08 +0200
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
 suggest a good set?
Message-ID: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>

Hi guys,
I'm slowly building up my workbench, and after getting a Tek 7704 I
now need a good sinewave generator. I thought to myself, why buy just
a sinewave generator, when I could get a distortion meter? Those have
sinewave and square built in, are of variable frequency, and it's
better to have one large box than two large boxes.

Could someone suggest a good distortion analyzer that can be had
relatively inexpensively? I'm probably looking at vintage equipment at
this point because it can be had fairly cheaply. Something around 100
Euro would be a good start, but it's only a very roughly estimated
price range.. maybe those things can be had for much less -- or only
for much more?

Also: are distortion analyzers usually limited to 20 Hz - 20 kHz, or
are there ones that go below 1Hz and high above?

What is the 'workhorse' distortion analyzer? Is there one or a few
that were very good and very popular? It's important to me not to buy
something relatively unknown, so that when it breaks I can find
replacements, schematics, and people who know how to repair them.

What other tools - other than a distortion analyzer - could I see
myself using when building filters, mixers, amplifiers, etc? In the
future I'd also like to work a bit on tube circuits, but this is not
currently a major focus.

My plan is to get a distortion analyser (with integrated square and
sine wave oscillators), and I already have a frequency counter for the
Tek 7000 coming in. I'd probably get a curve tracer at some point too,
and maybe a precision current and voltage source or precision
amplifier. Still need an esr/LC meter, I saw some boxes online. To
round  this off I'd probably get an isolation transformer and possibly
variac (or both in one box). Am I missing something as far as the most
basic measurement equipment goes?

Thanks,
D.


From neil.johnson97 at ntlworld.com  Mon Apr 22 21:25:51 2013
From: neil.johnson97 at ntlworld.com (Neil Johnson)
Date: Mon, 22 Apr 2013 20:25:51 +0100
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
 suggest a good set?
In-Reply-To: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
References: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
Message-ID: <51758EBF.3020105@ntlworld.com>

On 22/04/2013 18:07, cheater00 . wrote:
> Hi guys,
> I'm slowly building up my workbench, and after getting a Tek 7704 I
> now need a good sinewave generator. I thought to myself, why buy just
> a sinewave generator, when I could get a distortion meter? Those have
> sinewave and square built in, are of variable frequency, and it's
> better to have one large box than two large boxes.

My thoughts on various test equipment:

http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=8

The signal generator in a distortion analyzer is unlikely to generate 
square waves, only very low distortion sine waves.  Depending on the 
type of distortion you want you want to measure you might need two 
signal generators.

> Could someone suggest a good distortion analyzer that can be had
> relatively inexpensively? I'm probably looking at vintage equipment at
> this point because it can be had fairly cheaply. Something around 100
> Euro would be a good start, but it's only a very roughly estimated
> price range.. maybe those things can be had for much less -- or only
> for much more?

Good distortion analysers still command good prices, so I think you need 
to review your budget.

> Also: are distortion analyzers usually limited to 20 Hz - 20 kHz, or
> are there ones that go below 1Hz and high above?

Unlikely to go down to 1Hz, but certainly above 20kHz.

> What is the 'workhorse' distortion analyzer? Is there one or a few
> that were very good and very popular? It's important to me not to buy
> something relatively unknown, so that when it breaks I can find
> replacements, schematics, and people who know how to repair them.

The HP 8903 (A or B) is a good machine.  Tektronix and Boonton are two 
other names to look out for.
Although it really depends what you want to measure.  The lower in 
distortion the higher the price.

> What other tools - other than a distortion analyzer - could I see
> myself using when building filters, mixers, amplifiers, etc? In the
> future I'd also like to work a bit on tube circuits, but this is not
> currently a major focus.

See link above for some ideas.

> My plan is to get a distortion analyser (with integrated square and
> sine wave oscillators), and I already have a frequency counter for the
> Tek 7000 coming in. I'd probably get a curve tracer at some point too,
> and maybe a precision current and voltage source or precision
> amplifier. Still need an esr/LC meter, I saw some boxes online. To
> round  this off I'd probably get an isolation transformer and possibly
> variac (or both in one box). Am I missing something as far as the most
> basic measurement equipment goes?

It really depends on what you want to build ("filters" is a very broad 
subject), how much investigation and development as opposed to 
build-n-test someone else's design, and how detailed you want to get in 
terms of measurement accuracy and precision.

Neil
-- 
Modules and more :: www.cesyg.com
Homepage :: www.njohnson.co.uk ::


From Tom.Hall at anglia.ac.uk  Mon Apr 22 22:43:41 2013
From: Tom.Hall at anglia.ac.uk (Hall, Tom)
Date: Mon, 22 Apr 2013 20:43:41 +0000
Subject: [sdiy] [OT] Peter Zinovieff 80th Birthday Concert & Symposium on
 Electronic and Computer Music, 11 May 2013, Cambridge UK
Message-ID: <CD9B5F8C.578D%tom.hall@anglia.ac.uk>


Hello All, and with apologies for cross-posting, please forward to anyone
who may be interested. Regards, Tom.

///////////////

Peter Zinovieff 80th Birthday Concert & Symposium on Electronic and
Computer Music 11 May 2013, Cambridge UK

Full list of speakers is available, all abstracts online, and registration
is open

Symposium registration includes a ticket to the Peter Zinovieff 80th
Birthday Concert. Tickets for the concert are also available separately
for those not attending the symposium.

Concert and symposium website: www.anglia.ac.uk/emsar

Please note that in order to qualify for the symposium lunch buffet,
registration must be completed at the latest by close of Tuesday 7 May,
2013.

///////////////


One Day Symposium on Electronic and Computer Music, EMSAR 2013

Including an evening concert celebrating the 80th birthday of electronic
music pioneer Dr Peter Zinovieff

Saturday 11 May 2013

Confirmed invited speakers include: Prof Monty Adkins (University of
Huddersfield), Dr Till Bovermann (Media Lab Helsinki), Prof Simon Emmerson
(De Montfort University), Dr Mick Grierson (Goldsmiths), Prof Peter
Manning (Durham University), Dr James Mooney (University of Leeds) and Dr
Peter Zinovieff.

The symposium concludes with an evening concert celebrating the 80th
birthday of electronic music pioneer Dr Peter Zinovieff, co-founder in the
late 1960s of Electronic Music Studios, London, and collaborator with such
composers as Harrison Birtwistle and Hans Werne Henze. Zinovieff is now
enjoying a blossoming of compositional activity and this concert will
include examples of both his early work, as well as his most recent work
in computer music.

Papers are around the following themes:

The materiality of early electronic, tape and computer music
Restoration and archiving of music involving technology
Modes of representation of electronic and computer music (objects, scores,
code?)
Constraints, affordances and the idiomatic in electronic, tape and
computer music
The DIY aesthetic in electronic music hardware of the 20th century
Hardware and virtual hardware for electronic music (re)creation
Collaborations between composers and music technologists in the 20th
Century
Electronic Music Studios (EMS) hardware for 21st Century electronic music
performance
Spatialisation techniques in early tape, electronic and computer music
Music technology hardware as a bridge between modernist and popular music
For any further information, please contact Dr Tom Hall:
Email: tom.hall at anglia.ac.uk

Anglia Ruskin University
Department of Music and Performing Arts,
Anglia Ruskin University
East Road
Cambridge
CB1 1PT
UK

www.anglia.ac.uk/mpa
www.anglia.ac.uk/code
www.anglia.ac.uk/dpl

Dr Tom Hall
Senior Lecturer, Creative Music Technology
Helmore 244
Department of Music and Performing Arts
Anglia Ruskin University
East Road, Cambridge CB1 1PT

Tel: 0845 196 2065 (x2065)
Intl: +44 1223 363271, ext 2065

www.anglia.ac.uk/tomhall
www.ludions.com



--

World-leading research.  The government rated 8 areas of our research activity as world-leading in the Research Assessment Exercise (RAE) 2008, they were:   Allied Health Professions & Studies; Art & Design; English Language & Literature; Geography & Environmental Studies; History; Music; Psychology and Social Work & Social Policy & Administration.

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From rsdio at sounds.wa.com  Tue Apr 23 03:01:30 2013
From: rsdio at sounds.wa.com (rsdio at sounds.wa.com)
Date: Mon, 22 Apr 2013 18:01:30 -0700
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
	suggest a good set?
In-Reply-To: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
References: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
Message-ID: <2000F1CA-F97C-4842-BDAB-6CD26FD73EA3@sounds.wa.com>

On Apr 22, 2013, at 10:07, cheater00 . wrote:
> Also: are distortion analyzers usually limited to 20 Hz - 20 kHz, or
> are there ones that go below 1Hz and high above?


I just attended an Audio Engineering Society talk/lecture titled  
"Audio, Radio, Acoustics, Signal Processing?the Way Forward," by J.J.  
Johnston, where a very important point was made: noise measurements  
are completely meaningless unless the spectrum is considered (i.e.  
SNR is pointless w/o spectrum). That's because our hearing is very  
frequency dependent, and signal-to-noise ratios as poor as 6 dB can  
be fine because the noise (distortion) is inaudible. Meanwhile, a 60  
dB signal-to-noise ratio might be insufficient if the harmonic  
distortion or other noise is at a very sensitive frequency like 1.5  
kHz. Not all THD is the same!

Distortion is basically a subset of noise, and if you can't hear the  
distortion then there's little need to measure it. Below 20 Hz,  
you're maybe going to feel something, but you can't really hear it.  
It's difficult to calculate amplitude for extremely low frequencies  
anyway, so I don't see the point of measuring distortion below 20 Hz.  
Any significant amount of harmonic distortion will involve harmonics  
within the 20 Hz to 20 kHz band, so those would be measured. Don't  
forget that if you're controlling the test signal frequency, then you  
can still measure the *audible* distortion from signals between 1 Hz  
and 20 Hz, but the THD factor will only include the harmonics we can  
hear.

As Neil mentioned, there is certainly measurement available above 20  
kHz, so the argument about what can be perceived above that doesn't  
need to be settled before you can measure it.

Brian Willoughby
Sound Consulting



From cheater00 at gmail.com  Tue Apr 23 08:41:39 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Tue, 23 Apr 2013 08:41:39 +0200
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
 suggest a good set?
In-Reply-To: <2000F1CA-F97C-4842-BDAB-6CD26FD73EA3@sounds.wa.com>
References: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
	<2000F1CA-F97C-4842-BDAB-6CD26FD73EA3@sounds.wa.com>
Message-ID: <CA+9GZUis5Vz2heDDD8AgKCMjv9Y0bbOk3wQT+7g1z_2M5QeVjQ@mail.gmail.com>

Thanks for the reminder about the weird nature of hearing. It's good
to have that every now and then.

But no, this is mostly just so that I have a tuneable oscillator that
goes below 20 Hz, that's all.

On Tue, Apr 23, 2013 at 3:01 AM,  <rsdio at sounds.wa.com> wrote:
> On Apr 22, 2013, at 10:07, cheater00 . wrote:
>>
>> Also: are distortion analyzers usually limited to 20 Hz - 20 kHz, or
>> are there ones that go below 1Hz and high above?
>
>
>
> I just attended an Audio Engineering Society talk/lecture titled "Audio,
> Radio, Acoustics, Signal Processing?the Way Forward," by J.J. Johnston,
> where a very important point was made: noise measurements are completely
> meaningless unless the spectrum is considered (i.e. SNR is pointless w/o
> spectrum). That's because our hearing is very frequency dependent, and
> signal-to-noise ratios as poor as 6 dB can be fine because the noise
> (distortion) is inaudible. Meanwhile, a 60 dB signal-to-noise ratio might be
> insufficient if the harmonic distortion or other noise is at a very
> sensitive frequency like 1.5 kHz. Not all THD is the same!
>
> Distortion is basically a subset of noise, and if you can't hear the
> distortion then there's little need to measure it. Below 20 Hz, you're maybe
> going to feel something, but you can't really hear it. It's difficult to
> calculate amplitude for extremely low frequencies anyway, so I don't see the
> point of measuring distortion below 20 Hz. Any significant amount of
> harmonic distortion will involve harmonics within the 20 Hz to 20 kHz band,
> so those would be measured. Don't forget that if you're controlling the test
> signal frequency, then you can still measure the *audible* distortion from
> signals between 1 Hz and 20 Hz, but the THD factor will only include the
> harmonics we can hear.
>
> As Neil mentioned, there is certainly measurement available above 20 kHz, so
> the argument about what can be perceived above that doesn't need to be
> settled before you can measure it.
>
> Brian Willoughby
> Sound Consulting
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From uwe.schueler at uni-tuebingen.de  Tue Apr 23 09:29:14 2013
From: uwe.schueler at uni-tuebingen.de (Uwe Schueler)
Date: Tue, 23 Apr 2013 09:29:14 +0200
Subject: [sdiy] Any synth DIY 'ers in Barcelona ?
Message-ID: <20130423092914.11803tml9clwjih6@webmail.uni-tuebingen.de>

hello !
I'm looking forward travelling to Spain tonight: 1 week beach, art and  
hopefully some music electronic solder fun in Barcelona ;-)
If someone listens from there and wants to introduce me and my wife to
the local synth DIY scene please drop me a line.

best regards, Uwe

-- 

uwe.schueler at uni-tuebingen.de

www.kulturgueter-schuppen.de





From rominbayol at gmail.com  Tue Apr 23 10:37:23 2013
From: rominbayol at gmail.com (Robyn Mayol)
Date: Tue, 23 Apr 2013 18:37:23 +1000
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
	suggest a good set?
In-Reply-To: <CA+9GZUis5Vz2heDDD8AgKCMjv9Y0bbOk3wQT+7g1z_2M5QeVjQ@mail.gmail.com>
References: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
	<2000F1CA-F97C-4842-BDAB-6CD26FD73EA3@sounds.wa.com>
	<CA+9GZUis5Vz2heDDD8AgKCMjv9Y0bbOk3wQT+7g1z_2M5QeVjQ@mail.gmail.com>
Message-ID: <12B98375-9EE6-4704-9A20-C15137CD1E6B@gmail.com>

Hey D.

If you just want to build a tuneable oscillator you can easily make you own.

The data sheet for the LM358 (dual op amp) has the schematics for a triangle / square VCO: http://www.ti.com/lit/ds/symlink/lm158-n.pdf (top of page 2). I was able to put it together easily even though it was only the 3rd circuit I ever breadboarded.

In case you don't have 51K and 50K resistors you can just replace them all with 47K, it worked fine for me. You can use a single power supply with the LM358 so all you'll have to do is make a voltage divider for the positive input of the right op amp (where it says V+/2). I am using two 100R resistors but any value is good as long as it is two resistors of the same value (http://en.wikipedia.org/wiki/Voltage_divider). I also replaced the 0.05uF feedback cap with a 0.047uF (also called 47nF) because I didn't have the right value.

Here is what it will sound like: https://www.facebook.com/photo.php?v=640919502590636.

And here is a simulation of the circuit: http://www.falstad.com/circuit/#%24+1+5.0E-6+54.00526672067058+68+5.0+43%0Aa+224+176+336+176+0+6.0+0.0+1000000.0%0Aa+512+192+608+192+0+6.0+0.0+1000000.0%0Ac+224+96+336+96+0+4.7000000000000004E-8+-2.3766784613120984%0Aw+336+96+336+176+0%0Aw+336+176+512+176+0%0Aw+336+176+336+304+0%0Aw+336+304+608+304+0%0AO+608+192+656+192+0%0AO+608+304+656+304+0%0Aw+608+192+608+272+0%0Aw+608+272+608+352+0%0Ar+608+352+224+352+0+10000.0%0Ar+608+272+512+272+0+100000.0%0Ar+512+208+448+208+0+47000.0%0Aw+512+208+512+272+0%0At+224+352+192+352+0+1+-0.1803259537834405+-5.230656564744769E-5+100.0%0Ar+192+336+192+160+0+47000.0%0Aw+192+160+224+160+0%0Aw+224+160+224+96+0%0Ar+192+160+112+160+0+100000.0%0Ar+224+192+112+192+0+47000.0%0Aw+112+160+112+176+0%0Aw+112+192+112+176+0%0A174+112+176+16+208+0+1000000.0+0.35150000000000003+Resistance%0Ar+224+192+224+272+0+47000.0%0Ag+224+272+224+288+0%0Ar+448+208+448+272+0+1000.0%0Ag+448+272+448+288+0%0Ar+448+208+448+80+0+1000.0%0AR+448+80+400+80+0+0+40.0+6.0+0.0+0.0+0.5%0AR+16+176+16+128+0+0+40.0+6.0+0.0+0.0+0.5%0Ag+192+368+192+400+0%0Ao+7+64+0+34+10.0+9.765625E-5+0+-1%0Ao+8+64+0+34+5.0+9.765625E-5+1+-1%0A

By the way, if anyone more experienced than me has feedback about the modifications I made to the original circuit I'm happy to take it on board!
 
> But no, this is mostly just so that I have a tuneable oscillator that
> goes below 20 Hz, that's all.


From neil.johnson71 at gmail.com  Tue Apr 23 11:04:43 2013
From: neil.johnson71 at gmail.com (Neil Johnson)
Date: Tue, 23 Apr 2013 10:04:43 +0100
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
 suggest a good set?
In-Reply-To: <12B98375-9EE6-4704-9A20-C15137CD1E6B@gmail.com>
References: <CA+9GZUgWurTc56bjN8y8X2=hkY_OWN-SDZjyRfD5Nc60vynQcQ@mail.gmail.com>
	<2000F1CA-F97C-4842-BDAB-6CD26FD73EA3@sounds.wa.com>
	<CA+9GZUis5Vz2heDDD8AgKCMjv9Y0bbOk3wQT+7g1z_2M5QeVjQ@mail.gmail.com>
	<12B98375-9EE6-4704-9A20-C15137CD1E6B@gmail.com>
Message-ID: <CACZGMxL=GiiFVY3hUfbstNypQxvs9E7C_nx899-rrD4F1ELAQA@mail.gmail.com>

> If you just want to build a tuneable oscillator you can easily make you own.

For measuring distortion you need a really good oscillator.  Here is a
fine example of a home-built distortion analyser:

http://www.users.on.net/~glenk/thd/thd.htm

which includes a low-distortion sine oscillator.

But if you just need a bench signal source and don't care too much
about quality (noise, distortion, stability, range, etc) then unless
you want to a build an oscillator for the fun of it you can pick one
up on eBay for much less than it would cost you to build (assuming you
want it in a case, with a power supply, terminals, range switches,
knobs, etc).

In the circuit that Robyn posted the output has a +3V offset, and the
frequency setting pot needs its wiper connecting to +6V.

Cheers,
Neil
--
http://www.njohnson.co.uk


From cheater00 at gmail.com  Tue Apr 23 11:10:27 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Tue, 23 Apr 2013 11:10:27 +0200
Subject: [sdiy] Any synth DIY 'ers in Barcelona ?
In-Reply-To: <20130423092914.11803tml9clwjih6@webmail.uni-tuebingen.de>
References: <20130423092914.11803tml9clwjih6@webmail.uni-tuebingen.de>
Message-ID: <CA+9GZUhg3EAdjJEOpmjeaVrsWYHyxM0f2UtT_Cr-tenmGjHnGA@mail.gmail.com>

Hi,
I'd like to visit Barcelona some time as well :) if you find out
anything, let me know!

BTW, consider also asking in AH.

Cheers,
D.

On Tue, Apr 23, 2013 at 9:29 AM, Uwe Schueler
<uwe.schueler at uni-tuebingen.de> wrote:
> hello !
> I'm looking forward travelling to Spain tonight: 1 week beach, art and
> hopefully some music electronic solder fun in Barcelona ;-)
> If someone listens from there and wants to introduce me and my wife to
> the local synth DIY scene please drop me a line.
>
> best regards, Uwe
>
> --
>
> uwe.schueler at uni-tuebingen.de
>
> www.kulturgueter-schuppen.de
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From mars at pingdynasty.com  Tue Apr 23 12:05:56 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Tue, 23 Apr 2013 11:05:56 +0100
Subject: [sdiy] Any synth DIY 'ers in Barcelona ?
In-Reply-To: <20130423092914.11803tml9clwjih6@webmail.uni-tuebingen.de>
References: <20130423092914.11803tml9clwjih6@webmail.uni-tuebingen.de>
Message-ID: <75C1697B-EEB7-456A-B20C-63DCD3FC47E2@pingdynasty.com>


I'd suggest getting in touch with the befaco guys
http://www.befaco.org/
They'll know.

hth,

/m

On 23 Apr 2013, at 08:29, Uwe Schueler wrote:

> hello !
> I'm looking forward travelling to Spain tonight: 1 week beach, art and hopefully some music electronic solder fun in Barcelona ;-)
> If someone listens from there and wants to introduce me and my wife to
> the local synth DIY scene please drop me a line.
> 
> best regards, Uwe
> 
> -- 
> 
> uwe.schueler at uni-tuebingen.de
> 
> www.kulturgueter-schuppen.de
> 
> 
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From niroke at tampabay.rr.com  Tue Apr 23 14:30:29 2013
From: niroke at tampabay.rr.com (Nicholas Keller)
Date: Tue, 23 Apr 2013 08:30:29 -0400
Subject: [sdiy] CEM3396 driver
Message-ID: <2E54C116-4CAC-42F7-8E59-BCDF6F0A74F4@tampabay.rr.com>

Hi all. 

I have one of these chips and was hoping to build a eurorack module for it.  

My searches regarding this chip always turn up a micro-controller in the circuit.  Could this chip not just "track" a regular pulse VCO's output?  

Please keep any answer simple, as I have zero experience with micro-controllers. (But say more than just "no")
 
Thanks

Nick 

Sent from the future

From dave at westphila.net  Tue Apr 23 18:43:05 2013
From: dave at westphila.net (David Moylan)
Date: Tue, 23 Apr 2013 09:43:05 -0700
Subject: [sdiy] CEM3396 driver
In-Reply-To: <2E54C116-4CAC-42F7-8E59-BCDF6F0A74F4@tampabay.rr.com>
References: <2E54C116-4CAC-42F7-8E59-BCDF6F0A74F4@tampabay.rr.com>
Message-ID: <5176BA19.30904@westphila.net>

The waveshape CV needs to change as the timing pulse frequency changes 
to maintain a static waveshape.  Read the datasheet.  Possible to do it 
in analog but would probably more of a pain than it's worth.


On 4/23/13 5:30 AM, Nicholas Keller wrote:
> Hi all.
>
> I have one of these chips and was hoping to build a eurorack module for it.
>
> My searches regarding this chip always turn up a micro-controller in the circuit.  Could this chip not just "track" a regular pulse VCO's output?
>
> Please keep any answer simple, as I have zero experience with micro-controllers. (But say more than just "no")
>
> Thanks
>
> Nick
>
> Sent from the future
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>



From niroke at tampabay.rr.com  Tue Apr 23 19:29:47 2013
From: niroke at tampabay.rr.com (Nicholas Keller)
Date: Tue, 23 Apr 2013 13:29:47 -0400
Subject: [sdiy] CEM3396 driver
In-Reply-To: <2E54C116-4CAC-42F7-8E59-BCDF6F0A74F4@tampabay.rr.com>
References: <2E54C116-4CAC-42F7-8E59-BCDF6F0A74F4@tampabay.rr.com>
Message-ID: <F06A9B8F-23F7-46A9-8A9E-C281E2A9C8DA@tampabay.rr.com>

Thanks for your reply, David. I will have to wait to look at the sheet until I get home. 

Nick

Sent from the future

On Apr 23, 2013, at 8:30 AM, Nicholas Keller <niroke at tampabay.rr.com> wrote:

> Hi all. 
> 
> I have one of these chips and was hoping to build a eurorack module for it.  
> 
> My searches regarding this chip always turn up a micro-controller in the circuit.  Could this chip not just "track" a regular pulse VCO's output?  
> 
> Please keep any answer simple, as I have zero experience with micro-controllers. (But say more than just "no")
> 
> Thanks
> 
> Nick 
> 
> Sent from the future
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From thx1138 at earthlink.net  Tue Apr 23 21:35:26 2013
From: thx1138 at earthlink.net (thx1138)
Date: Tue, 23 Apr 2013 12:35:26 -0700
Subject: [sdiy] Audio test generator and mesurement tool - can
	anyone	suggest a good set?
In-Reply-To: <CA+9GZUis5Vz2heDDD8AgKCMjv9Y0bbOk3wQT+7g1z_2M5QeVjQ@mail.gmail.com>
Message-ID: <CD9C308E.D354%thx1138@earthlink.net>

Hi Folks,

Check out the Freeware Vitual analyzer http://www.sillanumsoft.org/.

I use it with my M-Tools box and it actually works quite well.

I also use Bruel & Kjar gear when.

Terry



On 4/22/13 11:41 PM, "cheater00 ." <cheater00 at gmail.com> wrote:

> Thanks for the reminder about the weird nature of hearing. It's good
> to have that every now and then.
> 
> But no, this is mostly just so that I have a tuneable oscillator that
> goes below 20 Hz, that's all.
> 
> On Tue, Apr 23, 2013 at 3:01 AM,  <rsdio at sounds.wa.com> wrote:
>> On Apr 22, 2013, at 10:07, cheater00 . wrote:
>>> 
>>> Also: are distortion analyzers usually limited to 20 Hz - 20 kHz, or
>>> are there ones that go below 1Hz and high above?
>> 
>> 
>> 
>> I just attended an Audio Engineering Society talk/lecture titled "Audio,
>> Radio, Acoustics, Signal Processing?the Way Forward," by J.J. Johnston,
>> where a very important point was made: noise measurements are completely
>> meaningless unless the spectrum is considered (i.e. SNR is pointless w/o
>> spectrum). That's because our hearing is very frequency dependent, and
>> signal-to-noise ratios as poor as 6 dB can be fine because the noise
>> (distortion) is inaudible. Meanwhile, a 60 dB signal-to-noise ratio might be
>> insufficient if the harmonic distortion or other noise is at a very
>> sensitive frequency like 1.5 kHz. Not all THD is the same!
>> 
>> Distortion is basically a subset of noise, and if you can't hear the
>> distortion then there's little need to measure it. Below 20 Hz, you're maybe
>> going to feel something, but you can't really hear it. It's difficult to
>> calculate amplitude for extremely low frequencies anyway, so I don't see the
>> point of measuring distortion below 20 Hz. Any significant amount of
>> harmonic distortion will involve harmonics within the 20 Hz to 20 kHz band,
>> so those would be measured. Don't forget that if you're controlling the test
>> signal frequency, then you can still measure the *audible* distortion from
>> signals between 1 Hz and 20 Hz, but the THD factor will only include the
>> harmonics we can hear.
>> 
>> As Neil mentioned, there is certainly measurement available above 20 kHz, so
>> the argument about what can be perceived above that doesn't need to be
>> settled before you can measure it.
>> 
>> Brian Willoughby
>> Sound Consulting
>> 
>> 
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From juzowen at gmail.com  Wed Apr 24 11:54:32 2013
From: juzowen at gmail.com (Justin Owen)
Date: Wed, 24 Apr 2013 10:54:32 +0100
Subject: [sdiy] Jung op-amp cookbook editions help
Message-ID: <5177abd9.440ab40a.41de.ffffba20@mx.google.com>

Hi Neil,

Thanks for that.

Is that Sergio Franco? I don't have any of his books - Google throws up: "Design with Operational Amplifiers and Analog Integrated Circuits" - is that what you're referring too?

Cheers,

Justin



-----Original Message-----
From: Neil Johnson [neil.johnson97 at ntlworld.com]
Received: 23.04.2013 15:38:58
To: Justin Owen
Cc: SDIY List
Subject: Re: [sdiy] Jung op-amp cookbook editions help

I've found Franco has a much better explanation of log and antilog
circuits, as well as details of the emitter bulk resistance compensation
which is missing in Jung.

Neil


On 15 April 2013 18:56, Justin Owen <juzowen at gmail.com> wrote:

> Thanks Oscar!
>
> -----Original Message-----
> From: Oscar Salas [osalas at electronic-sea.net]
> Received: 15.04.2013 18:22:18
> To: Justin Owen
> Cc: SDIY List
> Subject: Re: [sdiy] Jung op-amp cookbook editions help
>
> Hello,
>
> Pag. 289
> Chapter Six
>
> > Hi,
> >
> > My 1st edition Jung's IC op-amp cookbook has the Log Generator and
> Antilog
> > (Exponential) Generator in Chapter 5.
> >
> > Can anyone with the 3rd edition tell me where these two circuits have
> > moved to please?
> >
> > Trying to help someone with a 3rd ed. that can't find them!
> >
> > Thanks,
> >
> > Justin
> >
> >
> >
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >
> >
>
>
> electronic-sea.net
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>



-- 
Modules and more: http://www.cesyg.com
Homepage: http://www.njohnson.co.uk




From neil.johnson71 at gmail.com  Wed Apr 24 12:15:41 2013
From: neil.johnson71 at gmail.com (Neil Johnson)
Date: Wed, 24 Apr 2013 11:15:41 +0100
Subject: [sdiy] Audio test generator and mesurement tool - can anyone
 suggest a good set?
In-Reply-To: <CD9C308E.D354%thx1138@earthlink.net>
References: <CA+9GZUis5Vz2heDDD8AgKCMjv9Y0bbOk3wQT+7g1z_2M5QeVjQ@mail.gmail.com>
	<CD9C308E.D354%thx1138@earthlink.net>
Message-ID: <CACZGMxJCxi3pPgu03Q-VhnVq9tA2svVcsy=XQWFKO9cymY+afg@mail.gmail.com>

The folks over at diyaudio have a long thread on low distortion audio
oscillators:

http://www.diyaudio.com/forums/equipment-tools/205304-low-distortion-audio-range-oscillator.html

247 pages and counting...

If you want to use a PC for testing audio devices then I gather the
QA400 is a good option:

http://www.quantasylum.com/content/Products/QA400.aspx

Neil
--
http://www.njohnson.co.uk


From neil.johnson71 at gmail.com  Wed Apr 24 12:23:48 2013
From: neil.johnson71 at gmail.com (Neil Johnson)
Date: Wed, 24 Apr 2013 11:23:48 +0100
Subject: [sdiy] Jung op-amp cookbook editions help
In-Reply-To: <5177abd9.440ab40a.41de.ffffba20@mx.google.com>
References: <5177abd9.440ab40a.41de.ffffba20@mx.google.com>
Message-ID: <CACZGMxJ8mOq-Yn7y_tSmpob+pGMAdw3KPkEVrd6QJ3+-wpvpgQ@mail.gmail.com>

Hi Justin,

> Is that Sergio Franco? I don't have any of his books - Google throws up: "Design with Operational Amplifiers and Analog Integrated Circuits" - is that what you're referring too?

Yes that's the one.  Jung, by comparison, is lot lighter (less
technical detail), which may be a good thing or not depending on what
you want out of it.

Cheers,
Neil
--
http://www.njohnson.co.uk


From mars at pingdynasty.com  Wed Apr 24 16:50:54 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Wed, 24 Apr 2013 15:50:54 +0100
Subject: [sdiy] The Owl: ARM fx pedal
Message-ID: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>

hi hackers!

I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.

The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
a 32bit powerhouse with built in DSP and floating point processing units.

We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.

We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!

http://hoxtonowl.com/specification/

best,

Martin Klang
Rebel Technology
London UK

From thx1138 at earthlink.net  Wed Apr 24 17:16:13 2013
From: thx1138 at earthlink.net (Terry Shultz)
Date: Wed, 24 Apr 2013 08:16:13 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
Message-ID: <7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>

Hi martin

I would like to suggest that any cortex m4 based part could be used. 

I was involved in the tone core pedal project and found that many folks had little dsp experience and were stumped on where to get examples that were relevant. The cmsis dsp libs are a good source point and perhaps one point to note, is that the Keil compiler was used to develop the library of dsp functions. So performance may differ greatly upon compiler selection.

Check out the audio weaver tool from dsp concepts. Dr. Beckmann owns this site and he was involved in the cmsis lib development for arm.

Overall, I would like to build upon this effort.

Regards,

Terry
Sent from my iPad

On Apr 24, 2013, at 7:50 AM, Martin Klang <mars at pingdynasty.com> wrote:

> hi hackers!
> 
> I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.
> 
> The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
> a 32bit powerhouse with built in DSP and floating point processing units.
> 
> We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.
> 
> We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!
> 
> http://hoxtonowl.com/specification/
> 
> best,
> 
> Martin Klang
> Rebel Technology
> London UK
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From modlfo at gmail.com  Wed Apr 24 17:29:16 2013
From: modlfo at gmail.com (Leonardo Laguna Ruiz)
Date: Wed, 24 Apr 2013 17:29:16 +0200
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
Message-ID: <5177FA4C.9060302@gmail.com>

Looks great! I will get one when it's available.

I have a Line 6 ToneCore development kit but it is pretty much useless 
in my case, since I can only develop in Windows 7 32 bits, which I only 
have in my netbook.

The things that I would like to have are:

- Possibility to expand the controls. e.g. a port where I can 
send/receive data using I2c, SPI or MIDI. That way I can add more knobs, 
LCD or a MIDI keyboard if I need it.

- Possibility of programming and uploading firmware in Linux.

I will definitely back you kick starter.

Leonardo


On 04/24/2013 04:50 PM, Martin Klang wrote:
> hi hackers!
>
> I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.
>
> The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
> a 32bit powerhouse with built in DSP and floating point processing units.
>
> We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.
>
> We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!
>
> http://hoxtonowl.com/specification/
>
> best,
>
> Martin Klang
> Rebel Technology
> London UK
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From mars at pingdynasty.com  Wed Apr 24 19:16:37 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Wed, 24 Apr 2013 18:16:37 +0100
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <5177FA4C.9060302@gmail.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<5177FA4C.9060302@gmail.com>
Message-ID: <931FD6D3-5F8D-4562-B7B6-C5D0525DB0C6@pingdynasty.com>

Thanks Leonardo!

the ToneCore looks like good hardware, I've not used it but it does seem to require very specialised skills to program.
We want to ensure our toolchain is open source and cross platform, and that patches can be written in plain C/C++.

For the exact feature set of the finished product, it will depend a lot on how much money we can raise. So we are loath to promise too much!
But rest assured that your requests have been heard. Moreover, 'hackability' is already very high on our agenda.

best,

Martin

On 24 Apr 2013, at 16:29, Leonardo Laguna Ruiz wrote:

> Looks great! I will get one when it's available.
> 
> I have a Line 6 ToneCore development kit but it is pretty much useless in my case, since I can only develop in Windows 7 32 bits, which I only have in my netbook.
> 
> The things that I would like to have are:
> 
> - Possibility to expand the controls. e.g. a port where I can send/receive data using I2c, SPI or MIDI. That way I can add more knobs, LCD or a MIDI keyboard if I need it.
> 
> - Possibility of programming and uploading firmware in Linux.
> 
> I will definitely back you kick starter.
> 
> Leonardo
> 
> 
> On 04/24/2013 04:50 PM, Martin Klang wrote:
>> hi hackers!
>> 
>> I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.
>> 
>> The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
>> a 32bit powerhouse with built in DSP and floating point processing units.
>> 
>> We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.
>> 
>> We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!
>> 
>> http://hoxtonowl.com/specification/
>> 
>> best,
>> 
>> Martin Klang
>> Rebel Technology
>> London UK
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From paul at cometway.com  Wed Apr 24 19:56:18 2013
From: paul at cometway.com (Paul Cunningham)
Date: Wed, 24 Apr 2013 13:56:18 -0400
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <5177FA4C.9060302@gmail.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<5177FA4C.9060302@gmail.com>
Message-ID: <FB428E6A-9C48-44A8-B1E8-C894F1FB16E0@cometway.com>

I like it but i needs MIDI for the types of things i'd like to do... like tempo synchronization. This is so often a rare feature on contemporary effects that could otherwise really benefit from external controls... tap tempo button is also key (esp if theres no midi) -pc

On Apr 24, 2013, at 11:29 AM, Leonardo Laguna Ruiz <modlfo at gmail.com> wrote:

> Looks great! I will get one when it's available.
> 
> I have a Line 6 ToneCore development kit but it is pretty much useless in my case, since I can only develop in Windows 7 32 bits, which I only have in my netbook.
> 
> The things that I would like to have are:
> 
> - Possibility to expand the controls. e.g. a port where I can send/receive data using I2c, SPI or MIDI. That way I can add more knobs, LCD or a MIDI keyboard if I need it.
> 
> - Possibility of programming and uploading firmware in Linux.
> 
> I will definitely back you kick starter.
> 
> Leonardo
> 
> 
> On 04/24/2013 04:50 PM, Martin Klang wrote:
>> hi hackers!
>> 
>> I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.
>> 
>> The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
>> a 32bit powerhouse with built in DSP and floating point processing units.
>> 
>> We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.
>> 
>> We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!
>> 
>> http://hoxtonowl.com/specification/
>> 
>> best,
>> 
>> Martin Klang
>> Rebel Technology
>> London UK
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From mars at pingdynasty.com  Wed Apr 24 20:15:26 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Wed, 24 Apr 2013 19:15:26 +0100
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
Message-ID: <4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>


On 24 Apr 2013, at 18:43, Paul Beckmann wrote:

> Hi Terry and Martin,
> An open source effects pedal is a great idea.  We had brainstormed about this in the past and considered leveraging our Audio Weaver design tools.  We figured that about 90% of customers would want to design audio effects graphically while the other 10% might roll up their sleeves and write their own C code.

I think we want to target programmers to begin with (the 10%), then expand.
What we want to leverage is the skills and talents of all the coders who are currently doing VST plugins and other software-based solutions.

> The benchmarks listed on the hoxtonowl.com web site aren't accurate.  The Cortex-M4 has basic DSP instructions but lacks a lot of the capabilities of a traditional DSP.  A DSP can do a Biquad in 5 instructions; the Cortex-M4 takes about 13 cycles in the inner loop.  If you are open to changing processors, you might look at the M4 family from NXP.  The device runs at up to 204 MHz.

Can you elaborate on this, please?
I'm not an expert, I but I understand a biquad filter requires 5 multiply and accumulate (MAC) operations per sample.
The Cortex M4 does single-cycle MAC - see here:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0439b/CHDDIGAC.html

Therefore I don't think our information is inaccurate, though it could be more precise. Please correct me if you think I'm wrong!

best,

Martin

From ebrombaugh1 at cox.net  Wed Apr 24 20:25:18 2013
From: ebrombaugh1 at cox.net (Eric Brombaugh)
Date: Wed, 24 Apr 2013 11:25:18 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
Message-ID: <5178238E.1010001@cox.net>

On 04/24/2013 11:15 AM, Martin Klang wrote:
> I'm not an expert, I but I understand a biquad filter requires 5 multiply and accumulate (MAC) operations per sample.
> The Cortex M4 does single-cycle MAC - see here:
> http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0439b/CHDDIGAC.html
>
> Therefore I don't think our information is inaccurate, though it could be more precise. Please correct me if you think I'm wrong!

A "traditional" DSP has multiple operand buses and address generation 
units that allow coefficient and data to be fetched in parallel with the 
MAC operations. The ARM Cortex M4 processor has individual DSP-like 
instructions but you must include other instructions to fetch operands, 
increment addresses, save results, etc. All this means that the ARM DSP 
will take significantly more instruction cycles to compute a filter than 
would a DSP.

Eric




From rsdio at sounds.wa.com  Wed Apr 24 20:46:19 2013
From: rsdio at sounds.wa.com (rsdio at sounds.wa.com)
Date: Wed, 24 Apr 2013 11:46:19 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
Message-ID: <9EFB9684-2754-4DE5-B5AF-9D4C43134813@sounds.wa.com>


On Apr 24, 2013, at 11:15, Martin Klang wrote:
> On 24 Apr 2013, at 18:43, Paul Beckmann wrote:
>> The benchmarks listed on the hoxtonowl.com web site aren't  
>> accurate.  The Cortex-M4 has basic DSP instructions but lacks a  
>> lot of the capabilities of a traditional DSP.  A DSP can do a  
>> Biquad in 5 instructions; the Cortex-M4 takes about 13 cycles in  
>> the inner loop.  If you are open to changing processors, you might  
>> look at the M4 family from NXP.  The device runs at up to 204 MHz.
>
> Can you elaborate on this, please?
> I'm not an expert, I but I understand a biquad filter requires 5  
> multiply and accumulate (MAC) operations per sample.
> The Cortex M4 does single-cycle MAC - see here:
> http://infocenter.arm.com/help/index.jsp?topic=/ 
> com.arm.doc.ddi0439b/CHDDIGAC.html
>
> Therefore I don't think our information is inaccurate, though it  
> could be more precise. Please correct me if you think I'm wrong!

You're looking only at the MAC instruction itself, which only  
operates on data in registers, and handles no looping. That's not  
nearly the whole picture.

A full DSP like the TMS320 or OMAP can fetch two full audio samples,  
calculate the MAC, store the result, increment all three memory  
pointers, wrap the pointers for the buffer size range, decrement a  
loop counter, and then decide to repeat the instruction without  
having to fetch a new opcode. All of the operations listed occur in a  
single cycle on a proper DSP. Note that the TMS320 has three full- 
width read busses and two full-width write busses that can operate at  
the same time during a single cycle, as well as on-board SRAM that  
can support multiple, simultaneous accesses (provided that you  
allocate your buffers so they don't impinge on each other).

The same operations in the ARM would require several instructions.  
Sure, the MAC only takes a cycle, but: You have to get the data into  
the registers. You have to store the results somewhere. You have to  
manage pointers and loop variables. I haven't checked Paul's  
calculations, but I assume he's correct that it would take about 13  
cycles in an inner loop to accomplish the complete set of tasks that  
a DSP handles in a single cycle. Then you have to be prepared that  
the compiler might not always emit the most efficient instructions,  
and suddenly your loop takes way more than 13 cycles.

By the way, frequently-used DSP routines are often written in  
assembly, meaning that performance doesn't slow down when you switch  
compilers. Also, processors like the TMS320 can fetch an entire  
subroutine of multiple instructions into cache and loop without tying  
up the memory bus fetching the same opcodes over and over. Of course,  
other processors have instruction cache, but a DSP often allows very  
precise control over this.

I'd actually recommend the Analog Devices SHARC or Texas Instruments  
OMAP. The latter combines an ARM core with a TMS320 DSP core, such  
that you have both the efficiency of DSP instructions for audio  
processing plus the ease of use of ARM for the high-level control.  
Then again, dual core programming with asymmetrical processing like  
the OMAP might be too challenging for beginners, unless a very solid  
operating system with reusable building blocks is built up as the  
basis for your pedal.


> What we want to leverage is the skills and talents of all the  
> coders who are currently doing VST plugins and other software-based  
> solutions.
Existing VST code will not be directly usable on your platform  
because it will be such a different environment (and should be, if  
you want lower latency). It's hard enough to convince VST plugin  
developers to support AudioUnits, which represent a huge market  
compared to an fx pedal.

There is a huge difference between single-sample-based DSP and  
framebuffer-based DSP. The mindset is quite similar, but the code  
doesn't readily port across. Not only that, but having a user  
interface for parameter changes is very different from operating in a  
hardware platform with only physical controls and no graphics.

Brian Willoughby
Sound Consulting



From mars at pingdynasty.com  Wed Apr 24 20:57:25 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Wed, 24 Apr 2013 19:57:25 +0100
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <5178238E.1010001@cox.net>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
	<5178238E.1010001@cox.net>
Message-ID: <EFEEE6F0-8324-4C5F-93F1-5C6BB9D67381@pingdynasty.com>

On 24 Apr 2013, at 19:25, Eric Brombaugh wrote:

> On 04/24/2013 11:15 AM, Martin Klang wrote:
>> I'm not an expert, I but I understand a biquad filter requires 5 multiply and accumulate (MAC) operations per sample.
>> The Cortex M4 does single-cycle MAC - see here:
>> http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0439b/CHDDIGAC.html
>> 
>> Therefore I don't think our information is inaccurate, though it could be more precise. Please correct me if you think I'm wrong!
> 
> A "traditional" DSP has multiple operand buses and address generation units that allow coefficient and data to be fetched in parallel with the MAC operations. The ARM Cortex M4 processor has individual DSP-like instructions but you must include other instructions to fetch operands, increment addresses, save results, etc. All this means that the ARM DSP will take significantly more instruction cycles to compute a filter than would a DSP.

I've come across this presentation paper just now:
http://www.arm.com/files/pdf/dspconceptsm4presentation.pdf

It uses an example of a 7-band EQ (designed in Audio Weaver!).
As compared to the M3 requiring 1291 cycles, the M4 performs this in 299 cycles.

Perhaps as an illustration of chip capabilities, this would be more useful.
We really just want to communicate an idea of what the chip is capable of, in terms of DSP, rather than give any exact benchmarks.

In the paper they also show optimised FIR code which computes in 1.6 cycles/sample, as opposed to 12 unoptimised, but I think it would be misleading to present that as an achievable result in the general case.

best,

Martin

From ebrombaugh1 at cox.net  Wed Apr 24 21:22:46 2013
From: ebrombaugh1 at cox.net (Eric Brombaugh)
Date: Wed, 24 Apr 2013 12:22:46 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <EFEEE6F0-8324-4C5F-93F1-5C6BB9D67381@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
	<5178238E.1010001@cox.net>
	<EFEEE6F0-8324-4C5F-93F1-5C6BB9D67381@pingdynasty.com>
Message-ID: <51783106.7040104@cox.net>

On 04/24/2013 11:57 AM, Martin Klang wrote:
> I've come across this presentation paper just now:
> http://www.arm.com/files/pdf/dspconceptsm4presentation.pdf
>
> It uses an example of a 7-band EQ (designed in Audio Weaver!).
> As compared to the M3 requiring 1291 cycles, the M4 performs this in 299 cycles.
>
> Perhaps as an illustration of chip capabilities, this would be more useful.
> We really just want to communicate an idea of what the chip is capable of, in terms of DSP, rather than give any exact benchmarks.
>
> In the paper they also show optimised FIR code which computes in 1.6 cycles/sample, as opposed to 12 unoptimised, but I think it would be misleading to present that as an achievable result in the general case.

I think that paper speaks for itself and not in the way that the authors 
intended - the complexity of hand-optimizing the ARM DSP code vs the 
simplicity of the traditional DSP code to which they are comparing 
themselves.

That said, I'm by no means denigrating the capabilities of the STM32F405 
MCU - I've used it in a number of audio projects so far and it is by far 
the best trade-off of cost, ease of use and features that I've come 
across to date. It is quite capable of handling a wide variety of audio 
processing tasks without requiring laborious optimization, and with 
optimization you could likely take it somewhat further. Just be aware 
that you're not likely to get the same sort of performance from the 
Cortex M4F that you would from something like a Blackfin or TMS320-C64x.

Eric





From onephatcat at earthlink.net  Wed Apr 24 21:26:01 2013
From: onephatcat at earthlink.net (JoelB)
Date: Wed, 24 Apr 2013 12:26:01 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <9EFB9684-2754-4DE5-B5AF-9D4C43134813@sounds.wa.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
	<9EFB9684-2754-4DE5-B5AF-9D4C43134813@sounds.wa.com>
Message-ID: <01B8F360-4FB6-4823-AAE7-313F6141542F@earthlink.net>



Sent from my iPhone

On Apr 24, 2013, at 11:46 AM, rsdio at sounds.wa.com wrote:

> It's hard enough to convince VST plugin developers to support AudioUnits, which represent a huge market compared to an fx pedal

Hmm, I would think the market for audio units(Mac owners) is much smaller than the market for effects pedals (all guitarists everywhere on the planet)

-Joel 

From juzowen at gmail.com  Wed Apr 24 21:33:00 2013
From: juzowen at gmail.com (Justin Owen)
Date: Wed, 24 Apr 2013 20:33:00 +0100
Subject: [sdiy] OTA as Voltage Controlled Resistor
Message-ID: <5178336d.a163b40a.4225.1a7e@mx.google.com>

Hello,

The LM13700 data sheet shows a schem (Fig. 10) for a 'Floating Voltage Controlled Resistor' - this seems to be a double-ended circuit as opposed to the FET-based circuits (and the the LM13700 circuit in Fig. 9) which (from memory) are single-ended.

My questions...

1) Can the double-ended circuit be used to replace a standard discrete resistor - i.e. is either 'end' replacing a leg/pin of a resistor?

2) Assuming the answer to #1 is 'yes' - has anyone got any idea of what sort of resistance range could be pulled from an OTA?  

3) Can someone provide examples of how a single-ended circuit might be used?

In short, I'm wondering if an OTA VCR might be a suitable replacement for a vactrol under certain circumstances.

Thanks,

Justin



From rsdio at sounds.wa.com  Wed Apr 24 21:35:18 2013
From: rsdio at sounds.wa.com (rsdio at sounds.wa.com)
Date: Wed, 24 Apr 2013 12:35:18 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <51783106.7040104@cox.net>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
	<5178238E.1010001@cox.net>
	<EFEEE6F0-8324-4C5F-93F1-5C6BB9D67381@pingdynasty.com>
	<51783106.7040104@cox.net>
Message-ID: <30920921-0EB9-4CCC-BE15-0F8ABED01B05@sounds.wa.com>


On Apr 24, 2013, at 12:22, Eric Brombaugh wrote:
> On 04/24/2013 11:57 AM, Martin Klang wrote:
>> I've come across this presentation paper just now:
>> http://www.arm.com/files/pdf/dspconceptsm4presentation.pdf
>>
>> It uses an example of a 7-band EQ (designed in Audio Weaver!).
>> As compared to the M3 requiring 1291 cycles, the M4 performs this  
>> in 299 cycles.
>>
>> Perhaps as an illustration of chip capabilities, this would be  
>> more useful.
>> We really just want to communicate an idea of what the chip is  
>> capable of, in terms of DSP, rather than give any exact benchmarks.
>>
>> In the paper they also show optimised FIR code which computes in  
>> 1.6 cycles/sample, as opposed to 12 unoptimised, but I think it  
>> would be misleading to present that as an achievable result in the  
>> general case.
>
> I think that paper speaks for itself and not in the way that the  
> authors intended - the complexity of hand-optimizing the ARM DSP  
> code vs the simplicity of the traditional DSP code to which they  
> are comparing themselves.
>
> That said, I'm by no means denigrating the capabilities of the  
> STM32F405 MCU - I've used it in a number of audio projects so far  
> and it is by far the best trade-off of cost, ease of use and  
> features that I've come across to date. It is quite capable of  
> handling a wide variety of audio processing tasks without requiring  
> laborious optimization, and with optimization you could likely take  
> it somewhat further. Just be aware that you're not likely to get  
> the same sort of performance from the Cortex M4F that you would  
> from something like a Blackfin or TMS320-C64x.

Good points.

I recently designed with the TMS320VC5506. It costs the same as the  
STM32F405 and supports USB on-chip as well as parallel, I2C, SPI and  
I2S. The C5000 series is Texas Instruments' Ultra Low Power DSP and  
the efficiency of optimization certainly means it should use less  
power to get the same tasks done. Including 48 channels of audio  
(which require a lot of analog chips), my last C5506 product used  
only 250 mA from the USB power.

In my opinion, if the primary raison d'etre for your processor is to  
handle audio, then you should start by selecting a full DSP, even if  
that means the high-level code is less efficient. The bulk of the  
cycles will be spent on audio, with very few cycles reading knob  
settings, handling MIDI, or flashing an LED. ARM is great for general  
purpose computing, but don't let it's general popularity overshadow  
the fact that other processor designs are way more suited for audio,  
especially in a battery-powered setting.

SHARC is certainly a contender, but I have less experience with ultra  
low power potential with that chip family.

Brian Willoughby
Sound Consulting



From rsdio at sounds.wa.com  Wed Apr 24 23:05:18 2013
From: rsdio at sounds.wa.com (rsdio at sounds.wa.com)
Date: Wed, 24 Apr 2013 14:05:18 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <CAChMn9fvS4VLd1U741r6vgWCyJ8r89kkHM3AeBGowNk2RvGrGQ@mail.gmail.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
	<9EFB9684-2754-4DE5-B5AF-9D4C43134813@sounds.wa.com>
	<01B8F360-4FB6-4823-AAE7-313F6141542F@earthlink.net>
	<CAChMn9fvS4VLd1U741r6vgWCyJ8r89kkHM3AeBGowNk2RvGrGQ@mail.gmail.com>
Message-ID: <131B3038-1B8C-420E-82AF-89ABB9F78458@sounds.wa.com>


On Apr 24, 2013, at 12:33, firemote wrote:
> Yeah, it's hard to get the wider effects market to support VSTs,  
> why shouldn't it be even harder to support a niche like AU?
I did a bad job of making my point.

Porting from VST to AU is probably the easiest port to make, because  
the environment is almost exactly the same. Parameters are slightly  
different, hosts are slightly different, but in some cases they're  
even the same host. My point was that despite being easy, it's hard  
to convince VST developers to make an AU version of their plugin. The  
number of people running Logic is much, much greater than the number  
of guitarists with a programmable digital pedal.

In contrast, porting a VST from a DAW to an embedded, battery-powered  
platform is much, much harder than porting a VST to AU. Thus, my  
assumption is that if VST developers are reluctant to take a few easy  
steps to access the huge Logic, GarageBand, Ableton market, then  
they're not going to be eager to work even harder to support a paltry  
few guitarists who want a digital pedal that they can download  
plugins into.

Just my prediction. Nobody can see the future.


> On Wed, Apr 24, 2013 at 12:26 PM, JoelB <onephatcat at earthlink.net>  
> wrote:
>>
>>
>> Sent from my iPhone
>>
>> On Apr 24, 2013, at 11:46 AM, rsdio at sounds.wa.com wrote:
>>
>> > It's hard enough to convince VST plugin developers to support  
>> AudioUnits, which represent a huge market compared to an fx pedal
>>
>> Hmm, I would think the market for audio units(Mac owners) is much  
>> smaller than the market for effects pedals (all guitarists  
>> everywhere on the planet)
Not every guitarist will buy this specific pedal. Also, very few will  
actually want to write code for a pedal.

The market for all guitar pedals taken as a group is huge! But the  
market for an individual guitar pedal is quite small because there  
are so many. Just ask any boutique guitar pedal maker. That said, if  
you were designing a 9V adaptor for guitar pedals then you'd have a  
huge market, because that product would be attractive to every  
guitarist. Meanwhile, a programmable digital pedal is a small market.

Brian Willoughby
Sound Consulting



From mars at pingdynasty.com  Thu Apr 25 00:05:39 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Wed, 24 Apr 2013 23:05:39 +0100
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <131B3038-1B8C-420E-82AF-89ABB9F78458@sounds.wa.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<7D79A2B3-8FB0-4879-92FB-F6345C22E10A@earthlink.net>
	<CAJyLO-B+utr5hvTYq1Oc1O6kFFNEeR8n7PQrCGOeYBpQM7nZNA@mail.gmail.com>
	<4C34C13D-3EFF-415F-B174-DB65BF6F72CE@pingdynasty.com>
	<9EFB9684-2754-4DE5-B5AF-9D4C43134813@sounds.wa.com>
	<01B8F360-4FB6-4823-AAE7-313F6141542F@earthlink.net>
	<CAChMn9fvS4VLd1U741r6vgWCyJ8r89kkHM3AeBGowNk2RvGrGQ@mail.gmail.com>
	<131B3038-1B8C-420E-82AF-89ABB9F78458@sounds.wa.com>
Message-ID: <6485E02D-9705-4E80-AAE8-74662DCBE0AB@pingdynasty.com>


Thank you all who've commented, on list and off, for the great feedback!

I'll try to make the aim of the project a bit clearer, as this wasn't well expressed.

While there are more powerful DSP technologies available, what we want to create is a hardware platform that is easy to program using non-proprietary tools.
It is aimed at developers who are comfortable with, or interested in, coding audio applications for non-specialised hardware.
It is not meant to be the next big mass-market platform, nor do we suggest that anyone port their VSTs to run on it.

There are quite a few people on this list with amazing skills and experience in DSP, who have perhaps different demands and expectations compared to most of the open source community. While specialised audio DSP chips are clearly better at audio DSP, it shouldn't be underestimated how specialised and advanced the skills required to develop on these platforms are.
I think a case in point is the Line6 ToneCore Dev kit - great if you're already a seasoned DSP coder, tough if not.

By being open source and non-proprietary, we expect to attract developers and hobbyists who want a hardware platform to experiment with embedded audio. If we succeed then I have no doubt that wonderful and unconventional applications will come out of it - the creative potential is huge.

In the slightly longer term, we hope this will become a fun pedal for non-programmers who want to run the amazing code that is written for it. And we will work to create an eco-system around it for coders and musicians. But first, as Uncle Fester put it: developers, developers, developers, developers!

Many thanks again for the interest, happy to get more feedback!

Martin

From don at till.com  Thu Apr 25 00:12:40 2013
From: don at till.com (Donald Tillman)
Date: Wed, 24 Apr 2013 15:12:40 -0700
Subject: [sdiy] OTA as Voltage Controlled Resistor
In-Reply-To: <5178336d.a163b40a.4225.1a7e@mx.google.com>
References: <5178336d.a163b40a.4225.1a7e@mx.google.com>
Message-ID: <9754CD56-1CF7-44E8-B4EF-2272C80AE0DA@till.com>

On Apr 24, 2013, at 12:33 PM, Justin Owen <juzowen at gmail.com> wrote:

> 1) Can the double-ended circuit be used to replace a standard discrete resistor - i.e. is either 'end' replacing a leg/pin of a resistor?

Roughly, to a first approximation, yes.


> 2) Assuming the answer to #1 is 'yes' - has anyone got any idea of what sort of resistance range could be pulled from an OTA?  

The inverse of the transconductance (1/gm) which is set by the amplifier bias current, and include the effects of linearizing diodes and other resistance in the circuit.


> 3) Can someone provide examples of how a single-ended circuit might be used?

The single-ended circuit simply requires that one lead of the target resistor is grounded.


> In short, I'm wondering if an OTA VCR might be a suitable replacement for a vactrol under certain circumstances.

Yes, but... it wouldn't have the quirks that make the vactrol circuit charming, replacing them with these new OTA quirks.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com






From list at mikebeauchamp.com  Thu Apr 25 04:52:39 2013
From: list at mikebeauchamp.com (Mike Beauchamp)
Date: Wed, 24 Apr 2013 22:52:39 -0400
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
Message-ID: <1366858359.1784.178.camel@nwwtlaptop>

Looks nice Martin!

Maybe a breakout header on the board somewhere with access to some input
and output pins (plus serial, spi, whatever!) would make it even more
mod-friendly. 


On Wed, 2013-04-24 at 15:50 +0100, Martin Klang wrote:
> hi hackers!
> 
> I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.
> 
> The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
> a 32bit powerhouse with built in DSP and floating point processing units.
> 
> We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.
> 
> We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!
> 
> http://hoxtonowl.com/specification/
> 
> best,
> 
> Martin Klang
> Rebel Technology
> London UK
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy




From thx1138 at earthlink.net  Thu Apr 25 05:43:34 2013
From: thx1138 at earthlink.net (Terry Shultz)
Date: Wed, 24 Apr 2013 20:43:34 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
Message-ID: <3D43E6EC-3439-434D-8FEA-469E10E9A34E@earthlink.net>

Hi Martin,

Let's review some facts to consider for Open Source based projects.

Tools: 
	Free or near Free tools depending on Memory size limits i.e. IAR, Keil, CodeWarrior and Code Sourcery. Obviously CodeWarrior is Freescale product Centric.
Perhaps others can list other Free or Near Free tools on the Compiler side.

Debugging JTAG tools, FTDI have some parts that could be used to build up JTAG interfaces. Perhaps an open source debugger / JTAG chain?

I think Audio Processing on Cortex M4 is an interesting place to get audio hacking started to use ARM Cortex devices as a lower performance DSP/ Embedded microprocessor.

Several Cortex M4 suppliers to choose from and all have their merits and support in the Arduino camp. Much collateral to start to leverage from.

Hardware:

 the ToneCore pedal could be retasked to use a Cortex M4. Currently it uses a Freescale 9S08J64 for USB/ MCU and a DSP56364 for DSP functions. I have a good deal of the original material and we might be able to get Marcus Ryle to sell us some Tone core kits to retask to our needs. I'll send him a note and see what he says and get back to this list.

Dr. Beckmann has built up some great tools and perhaps a version could be crafted to be made available at a reduced price. 
Dr. Beckmann was correct to suggest 44.1 KHz as a target frequency.

What about a Stereo In and Out like the ToneCore unit?

General Midi could be supported via the USB and for software flashing into the memory.

I just don't want to steer this conversation to why the merits of a DSP.

The problem with the original ToneCore was it assumed people could program in assembly for the DSP56364. The Codewarrior tools supported the 9S08j64 with no real issue, but the Symphony Studio C Compiler does not really work well with 24-bit devices even though it is free and is still available.

I was plagued with calls on how to debug the DSP code and so on. Not a good place to start a Pedal Open source project.

Hopefully this steers the conversation back to your original intentions.

Thanks for all of your comments out there. Obviously some good replies and eager folks to get a project started.

 
Terry Shultz
DSP and ARM Audio Technology and Applications
thx1138 at earthlink.net



On Apr 24, 2013, at 7:50 AM, Martin Klang <mars at pingdynasty.com> wrote:

> hi hackers!
> 
> I'm involved with a project to build an Open Source, reprogrammable fx pedal based on the ARM Cortex M4 chipset.
> 
> The processor we have in mind is the STM32F405, which some of you on the list are very familiar with already:
> a 32bit powerhouse with built in DSP and floating point processing units.
> 
> We're planning to launch it on kickstarter, but we'd like to get some feedback from interested parties first.
> 
> We've got a preliminary spec sheet online, have a look and pls email me (or the list, if you think it is of general interest) with any thoughts, questions or ideas!
> 
> http://hoxtonowl.com/specification/
> 
> best,
> 
> Martin Klang
> Rebel Technology
> London UK
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From igg.debus at t-online.de  Thu Apr 25 16:40:47 2013
From: igg.debus at t-online.de (Ingo Debus)
Date: Thu, 25 Apr 2013 16:40:47 +0200
Subject: [sdiy] CEM3396 driver
In-Reply-To: <F06A9B8F-23F7-46A9-8A9E-C281E2A9C8DA@tampabay.rr.com>
References: <2E54C116-4CAC-42F7-8E59-BCDF6F0A74F4@tampabay.rr.com>
	<F06A9B8F-23F7-46A9-8A9E-C281E2A9C8DA@tampabay.rr.com>
Message-ID: <CA4F6235-53BA-4E9F-AB1B-0A2EA4CFB491@t-online.de>


Am 23.04.2013 um 19:29 schrieb Nicholas Keller:

> Thanks for your reply, David. I will have to wait to look at the sheet until I get home. 
> 
> Nick
> 
> Sent from the future

So CEM3396 ICs will still be available in the future? That's good to know!

Ingo

From juzowen at gmail.com  Thu Apr 25 18:30:15 2013
From: juzowen at gmail.com (Justin Owen)
Date: Thu, 25 Apr 2013 17:30:15 +0100
Subject: [sdiy] Newbie code porting question [was: The Owl: ARM fx pedal]
Message-ID: <51795a18.2308b40a.6a1b.360d@mx.google.com>

Not wanting to hijack Martin Klang's Owl thread (was I the only one singing Dead Kennedy's 'I Am The Owl' after that?) but Brian Willoughby touched on a point I've been meaning to ask for ages...

"...porting a VST from a DAW to an embedded, battery-powered  
platform is much, much harder than porting a VST to AU"

In general, is it feasible to consider porting code from software e.g. a plug-in or an app to code used in embedded hardware or (in general) would there be so little common ground between the two sets of code (or the two platforms) that you'd (generally) be better off starting with code dedicated to the platform you were running?

Please realise I'm asking this question with no software dev experience and my hardware coding experience is limited to some minor Arduino tinkering a few years back :) 

Thanks,

Justin





From rsdio at sounds.wa.com  Thu Apr 25 23:25:51 2013
From: rsdio at sounds.wa.com (rsdio at sounds.wa.com)
Date: Thu, 25 Apr 2013 14:25:51 -0700
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <3D43E6EC-3439-434D-8FEA-469E10E9A34E@earthlink.net>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<3D43E6EC-3439-434D-8FEA-469E10E9A34E@earthlink.net>
Message-ID: <DC6A5C67-BCAB-4943-A879-28EAF35F909C@sounds.wa.com>


On Apr 24, 2013, at 20:43, Terry Shultz wrote:
> Let's review some facts to consider for Open Source based projects.
>
> Tools:
> Debugging JTAG tools, FTDI have some parts that could be used to  
> build up JTAG interfaces. Perhaps an open source debugger / JTAG  
> chain?

Dangerous Prototypes has an impressive collection of open hardware /  
open firmware designs. Their JTAG debugger is the Bus Blaster.

http://dangerousprototypes.com/docs/Bus_Blaster

I had already purchased a couple of commercial JTAG debuggers before  
they designed this at Dangerous Prototypes, so I have not used this  
particular one myself. However, I have used the Dangerous Prototypes  
Bus Pirate and Gadget Factory / Open Bench Logic Sniffer. It's great  
to be able to help design improvements to the hardware and firmware  
for these tools. Highly recommended!

> Hardware:
>
>  the ToneCore pedal could be retasked to use a Cortex M4. Currently  
> it uses a Freescale 9S08J64 for USB/ MCU and a DSP56364 for DSP  
> functions. I have a good deal of the original material and we might  
> be able to get Marcus Ryle to sell us some Tone core kits to retask  
> to our needs. I'll send him a note and see what he says and get  
> back to this list.

Do you mean retask the ToneCore pedal mechanical hardware? I assume  
that the CPU would be entirely different for a new project, and thus  
the existing circuit boards would be tossed.

> Dr. Beckmann has built up some great tools and perhaps a version  
> could be crafted to be made available at a reduced price.
> Dr. Beckmann was correct to suggest 44.1 KHz as a target frequency.

Forgive my present ignorance, but who is this Dr. Beckmann? Not the  
cleaning fluid brand...
I suggest 48 kHz because it is easier to get that frequency by simple  
division of standard clock crystal frequencies. Designs become more  
complex when you need two crystals. An fx pedal probably won't have  
digital I/O anyway, so it could operate at 50 kHz or 60 kHz, making  
the anti-aliasing and reconstruction filters a bit simpler and cheaper.

> What about a Stereo In and Out like the ToneCore unit?

Great idea. I like that the ToneCore also supports mono, and even has  
a way for the CPU to detect whether it is being used in a stereo or  
mono situation. Many vocal and guitar effects will be at least mono  
input, if not also mono output.

> General Midi could be supported via the USB and for software  
> flashing into the memory.

I do not understand the link you seem to be making between General  
MIDI and software memory. Are you talking about MIDI System Exclusive  
for transfer of data? USB-MIDI is probably a good idea, if it doesn't  
add significantly to the cost.

> I was plagued with calls on how to debug the DSP code and so on.  
> Not a good place to start a Pedal Open source project.
>
> Terry Shultz
> DSP and ARM Audio Technology and Applications
> thx1138 at earthlink.net

Again, forgive my ignorance: Did you work on ToneCore? What sorts of  
support calls were you getting about DSP, and in what context?

Brian Willoughby
Sound Consulting



From rsdio at sounds.wa.com  Thu Apr 25 23:26:05 2013
From: rsdio at sounds.wa.com (rsdio at sounds.wa.com)
Date: Thu, 25 Apr 2013 14:26:05 -0700
Subject: [sdiy] Newbie code porting question
In-Reply-To: <51795a18.2308b40a.6a1b.360d@mx.google.com>
References: <51795a18.2308b40a.6a1b.360d@mx.google.com>
Message-ID: <B42365F4-63B0-4625-80AD-E72E68445FE0@sounds.wa.com>


On Apr 25, 2013, at 09:30, Justin Owen wrote:
> Brian Willoughby touched on a point I've been meaning to ask for  
> ages...
>
> "...porting a VST from a DAW to an embedded, battery-powered
> platform is much, much harder than porting a VST to AU"
>
> In general, is it feasible to consider porting code from software  
> e.g. a plug-in or an app to code used in embedded hardware or (in  
> general) would there be so little common ground between the two  
> sets of code (or the two platforms) that you'd (generally) be  
> better off starting with code dedicated to the platform you were  
> running?

If you're just starting, then think of the porting process as  
multiple steps.

First, you need to become familiar with the original code. In that  
sense, it's probably quite worthwhile for a new programmer to study  
existing code to the point where it is mostly understood.  
Unfortunately, this should probably be done in the original  
environment, e.g., VST host, and thus it's not porting at this stage.  
But if you can gain an understanding of the existing code, then  
you'll probably learn a lot about the DSP techniques involved.

Second, you need to really understand the strengths and weaknesses of  
the target platform. These are less about the task at hand and more  
about the general capabilities. Is there DMA? Is the CPU fast enough  
to respond to an interrupt per sample? What is the overhead of the  
interrupt call on this particular processor? Are there ramifications  
to doing major work in an interrupt routine? What is the operating  
system that you'll use, if any at all?

After studying both sides of the equation, you'll know whether the  
specific porting process you're considering has enough common ground  
to make the effort worthwhile. If there is too little common ground,  
at least you now fully understand the original code, and can perhaps  
rewrite the algorithms from scratch (or from building blocks  
available on the target platform) using that new knowledge. If there  
is common ground, you'll probably have a much better chance fitting  
the pieces into the new system.

DSP often involves some heavy weight math subroutines that are  
generally available on every platform. I've even ported VST code  
where the operating system and DAW stayed the same, but the math  
libraries changes. Apple offers Accelerate.framework and vecLib,  
supporting multiple processors. Intel offers common DSP that  
leverages SSE for optimization. Embedded systems hopefully implement  
these same math functions, but if they don't then you'll need to pull  
them together yourself. This is just one example where understanding  
high-level concepts about DSP allows you to swap out equivalent  
pieces even though the overall C code remains largely unchanged. In  
fact, optimization is one major area where code might not be  
portable, because what is optimal for one platform might be terribly  
inefficient for another.

You can't learn this without diving in, but I'd suggest working on  
open source "in place" for a while in order to become familiar with  
it before trying to port to a new platform. You can also play around  
with simpler code on the new platform until you're ready to try to  
get a large code base running.

Brian Willoughby
Sound Consulting



From neil.johnson71 at gmail.com  Fri Apr 26 00:05:36 2013
From: neil.johnson71 at gmail.com (Neil Johnson)
Date: Thu, 25 Apr 2013 23:05:36 +0100
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <DC6A5C67-BCAB-4943-A879-28EAF35F909C@sounds.wa.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<3D43E6EC-3439-434D-8FEA-469E10E9A34E@earthlink.net>
	<DC6A5C67-BCAB-4943-A879-28EAF35F909C@sounds.wa.com>
Message-ID: <CACZGMxJxAt652oFrCyCWgWog5CDQy18skhrGRuUqL97VYMePQg@mail.gmail.com>

Hi,

> Forgive my present ignorance, but who is this Dr. Beckmann? Not the cleaning
> fluid brand...

I think he means this chap:

http://www.dspconcepts.com/about/management

> Again, forgive my ignorance: Did you work on ToneCore? What sorts of support
> calls were you getting about DSP, and in what context?

LinkedIn is great for answering these kinds of questions :)
I'll let Terry fill you in on the details....

Cheers
Neil
--
http://www.njohnson.co.uk


From Simon.Wheaton at cit.edu.au  Fri Apr 26 02:45:51 2013
From: Simon.Wheaton at cit.edu.au (Wheaton, Simon)
Date: Fri, 26 Apr 2013 00:45:51 +0000
Subject: [sdiy] Any System 700 Clones (Photos/Details/PCB Layouts/Etc.)?
Message-ID: <2F67318E9986624E8D30B7C664E892C70B4A309F@PRDEXM001.act.gov.au>

> From: Damir Rogina [roginator1 at yahoo.com]
> Sent: Friday 26 April 2013 08:41
> Subject: [AH] Re: Total VCO Count
>
> System 700 clone .......4 VCO

Damir's post got me thinking some more, about something I have been thinking about for a while.

Has anyone cloned Roland System 700 modules/cabinets?

If so, are there any photos/details/pcb layouts/etc. available?

I have a System 700 main cabinet, sequencer, and one of the smaller side cabinets, plus a couple of bare modules.

I would love to complete the system, but can't afford current/future asking prices for real System 700 bits.

Unfortunately, I was screwed over on a good deal for an Oscillator Cabinet, paid for it, the seller never sent it, has been making excuses for years.

I have been thinking about cloning modules to complete the system for a long time, and would like to see other attempts, if they have been made.

Thanks,
Simon
Canberra
AUSTRALIA


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From pata at ieee.org  Fri Apr 26 03:38:30 2013
From: pata at ieee.org (Takuya Katayama)
Date: Fri, 26 Apr 2013 10:38:30 +0900 (JST)
Subject: [sdiy] Anyone Interested in Group-Buying CA3280AE?
Message-ID: <714537.10279.qm@web100718.mail.kks.yahoo.co.jp>

Hi Lists!

Recently, I've gotta some quotations of CA3280AE and I know 500-550JPY each.
(exclude shipping, tax/customs)

Is there anyone interested in group-buying?
Or less price?

Taku
-- 
===================================================
KATAYAMA, Takuya
Muse Music Synthesizer Laboratory, Japan


From dingebre at 3dphysics.net  Fri Apr 26 05:53:31 2013
From: dingebre at 3dphysics.net (David Ingebretsen)
Date: Thu, 25 Apr 2013 21:53:31 -0600
Subject: [sdiy] Moog 911A dual Trigger Delay
Message-ID: <004501ce4231$9e8c2b20$dba48160$@3dphysics.net>

Hi everyone! Long time lurking :)

I would like to beg for some ideas, please. I am trying my hand at a Moog
911A Dual Trigger delay. The original Moog schematic, the data sheet for an
E203 FET, and my schematic capture are at:

ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/E203.pdf
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/TriggerDelay.pdf
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/Moog911A1.1.pdf

I'm pretty sure I have the circuit properly entered into Eagle, and I'm
think this Moog schematic should work as it is shown.

The initial stage up to the FET, Q3, works fine. The problem is Q6 never
turns off, so something is happening between the FET and Q6.

I removed the FET in case it wasn't turning off, which means (assuming I
understand the circuit, which is a reach) means Q4 is off, Q5 is on, Q6 is
off and the output floats, like a good S-Trigger should. However, even
removing the FET, which I think should make sure there is no trigger output,
Q6 is still on. I'm assuming the transistors are operating as switches given
this module is dealing with triggers and not audio signals.

If I short Q6 base to ground, it turns off and the trigger is off.

Does anyone have a suggestion on how to trouble shoot this thing? I'd like
to think I can make something this simple work, but maybe that's too much to
expect :)

I'm enclosing the FET data in the hopes someone can help me find a
substitute. I'm trying a NTE466 which the NTE site recommended, but I'm open
for ideas.

Thanks everyone.

For fun, here is the latest info on my Synthasystem:
http://analoguerealities.blogspot.com/

David

David M. Ingebresten
dingebre at 3dphysics.net
dingebre at CFandE.com




From Peter.Ullrich at kapsch.net  Fri Apr 26 08:24:24 2013
From: Peter.Ullrich at kapsch.net (Ullrich Peter)
Date: Fri, 26 Apr 2013 08:24:24 +0200
Subject: [sdiy] Moog 911A dual Trigger Delay
Message-ID: <B156A86831A33949A0977840648802478C579ED88F@S060VS20.kapsch.co.at>

Hi!

According to this schematics R12 should be 2k7 and not 27k (and so the Q5 swithcing range is limited):

http://moogarchives.com/911as.jpg

Remark: Your original Moog schematics can not be loaded:
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/Moog911A1.1.pdf

Ciao
Peter

http://www.ullrich.at.tt



-----Urspr?ngliche Nachricht-----
Von: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl] Im Auftrag von David Ingebretsen
Gesendet: Freitag, 26. April 2013 05:54
An: synth-diy at dropmix.xs4all.nl
Betreff: [sdiy] Moog 911A dual Trigger Delay

Hi everyone! Long time lurking :)

I would like to beg for some ideas, please. I am trying my hand at a Moog 911A Dual Trigger delay. The original Moog schematic, the data sheet for an
E203 FET, and my schematic capture are at:

ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/E203.pdf
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/TriggerDelay.pdf
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/Moog911A1.1.pdf

I'm pretty sure I have the circuit properly entered into Eagle, and I'm think this Moog schematic should work as it is shown.

The initial stage up to the FET, Q3, works fine. The problem is Q6 never turns off, so something is happening between the FET and Q6.

I removed the FET in case it wasn't turning off, which means (assuming I understand the circuit, which is a reach) means Q4 is off, Q5 is on, Q6 is off and the output floats, like a good S-Trigger should. However, even removing the FET, which I think should make sure there is no trigger output,
Q6 is still on. I'm assuming the transistors are operating as switches given this module is dealing with triggers and not audio signals.

If I short Q6 base to ground, it turns off and the trigger is off.

Does anyone have a suggestion on how to trouble shoot this thing? I'd like to think I can make something this simple work, but maybe that's too much to expect :)

I'm enclosing the FET data in the hopes someone can help me find a substitute. I'm trying a NTE466 which the NTE site recommended, but I'm open for ideas.

Thanks everyone.

For fun, here is the latest info on my Synthasystem:
http://analoguerealities.blogspot.com/

David

David M. Ingebresten
dingebre at 3dphysics.net
dingebre at CFandE.com


_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

The information contained in this e-mail message is privileged and
confidential and is for the exclusive use of the addressee. The person
who receives this message and who is not the addressee, one of his
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informed that he may not use, disclose or reproduce the contents
thereof, and is kindly asked to notify the sender and delete the e-mail
immediately.




From carsten at analog-monster.de  Fri Apr 26 08:34:00 2013
From: carsten at analog-monster.de (Carsten Toensmann)
Date: Fri, 26 Apr 2013 08:34:00 +0200
Subject: [sdiy] Moog 911A dual Trigger Delay
In-Reply-To: <004501ce4231$9e8c2b20$dba48160$@3dphysics.net>
References: <004501ce4231$9e8c2b20$dba48160$@3dphysics.net>
Message-ID: <DBCDEABCB9344425BB1891952940407A@AnwenderPC>

Hi David,

I can highly recommend using a Spice simulation software like LTSpice or 
something like that. I did this for my own Moog module clones and checked 
the circuits for proper operation before heating up the soldering iron. In 
one case I found a bug / not working part in the Moog service maunal.
Another point is that you can fix side effects of using new components 
instead of the originals, like I had to do for my 914 Fixed Filter Bank 
clone. You can find more details here:

http://www.analog-monster.de/mmclone_en.html

I've not simulated the trigger delay yet, so I can't say anything about it 
now. Perhaps LTSpice is an option for you.

Regards

Carsten

-----Urspr?ngliche Nachricht----- 
From: David Ingebretsen
Sent: Friday, April 26, 2013 5:53 AM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] Moog 911A dual Trigger Delay

Hi everyone! Long time lurking :)

I would like to beg for some ideas, please. I am trying my hand at a Moog
911A Dual Trigger delay. The original Moog schematic, the data sheet for an
E203 FET, and my schematic capture are at:

ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/E203.pdf
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/TriggerDelay.pdf
ftp://ftp.xmission.com/pub/users/d/dingebre/outgoing/Moog911A1.1.pdf

I'm pretty sure I have the circuit properly entered into Eagle, and I'm
think this Moog schematic should work as it is shown.

The initial stage up to the FET, Q3, works fine. The problem is Q6 never
turns off, so something is happening between the FET and Q6.

I removed the FET in case it wasn't turning off, which means (assuming I
understand the circuit, which is a reach) means Q4 is off, Q5 is on, Q6 is
off and the output floats, like a good S-Trigger should. However, even
removing the FET, which I think should make sure there is no trigger output,
Q6 is still on. I'm assuming the transistors are operating as switches given
this module is dealing with triggers and not audio signals.

If I short Q6 base to ground, it turns off and the trigger is off.

Does anyone have a suggestion on how to trouble shoot this thing? I'd like
to think I can make something this simple work, but maybe that's too much to
expect :)

I'm enclosing the FET data in the hopes someone can help me find a
substitute. I'm trying a NTE466 which the NTE site recommended, but I'm open
for ideas.

Thanks everyone.

For fun, here is the latest info on my Synthasystem:
http://analoguerealities.blogspot.com/

David

David M. Ingebresten
dingebre at 3dphysics.net
dingebre at CFandE.com


_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy 



From cheater00 at gmail.com  Fri Apr 26 12:39:53 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Fri, 26 Apr 2013 12:39:53 +0200
Subject: [sdiy]  What to watch out for when buying Nixies?
Message-ID: <CA+9GZUi-79XZ5EqGGap_uziszmw_+8JHZDdQq5_2rnn6HJV-fg@mail.gmail.com>

Hi,
I was offered a fairly cheap piece of equipment (DVM) with nixies.
What should one watch out for? Can it be that several of the digits
are burnt out? Anything else?

Cheers,
D.


From juzowen at gmail.com  Fri Apr 26 12:48:40 2013
From: juzowen at gmail.com (Justin Owen)
Date: Fri, 26 Apr 2013 11:48:40 +0100
Subject: [sdiy] Newbie code porting question
Message-ID: <517a5b8a.ed14b40a.3c49.ffffb2ac@mx.google.com>

Thanks Brian - interesting answer.

I should have pointed out this isn't something I was considering doing myself. I was more interested in the feasibility of the concept. 

Seems like maybe it's feasible, maybe it's not - good odds!

Cheers,

J




-----Original Message-----
From:  [rsdio at sounds.wa.com]
Received: 25.04.2013 22:26:12
To: Justin Owen
Cc: SDIY List
Subject: Re: [sdiy] Newbie code porting question


On Apr 25, 2013, at 09:30, Justin Owen wrote:
> Brian Willoughby touched on a point I've been meaning to ask for  
> ages...
>
> "...porting a VST from a DAW to an embedded, battery-powered
> platform is much, much harder than porting a VST to AU"
>
> In general, is it feasible to consider porting code from software  
> e.g. a plug-in or an app to code used in embedded hardware or (in  
> general) would there be so little common ground between the two  
> sets of code (or the two platforms) that you'd (generally) be  
> better off starting with code dedicated to the platform you were  
> running?

If you're just starting, then think of the porting process as  
multiple steps.

First, you need to become familiar with the original code. In that  
sense, it's probably quite worthwhile for a new programmer to study  
existing code to the point where it is mostly understood.  
Unfortunately, this should probably be done in the original  
environment, e.g., VST host, and thus it's not porting at this stage.  
But if you can gain an understanding of the existing code, then  
you'll probably learn a lot about the DSP techniques involved.

Second, you need to really understand the strengths and weaknesses of  
the target platform. These are less about the task at hand and more  
about the general capabilities. Is there DMA? Is the CPU fast enough  
to respond to an interrupt per sample? What is the overhead of the  
interrupt call on this particular processor? Are there ramifications  
to doing major work in an interrupt routine? What is the operating  
system that you'll use, if any at all?

After studying both sides of the equation, you'll know whether the  
specific porting process you're considering has enough common ground  
to make the effort worthwhile. If there is too little common ground,  
at least you now fully understand the original code, and can perhaps  
rewrite the algorithms from scratch (or from building blocks  
available on the target platform) using that new knowledge. If there  
is common ground, you'll probably have a much better chance fitting  
the pieces into the new system.

DSP often involves some heavy weight math subroutines that are  
generally available on every platform. I've even ported VST code  
where the operating system and DAW stayed the same, but the math  
libraries changes. Apple offers Accelerate.framework and vecLib,  
supporting multiple processors. Intel offers common DSP that  
leverages SSE for optimization. Embedded systems hopefully implement  
these same math functions, but if they don't then you'll need to pull  
them together yourself. This is just one example where understanding  
high-level concepts about DSP allows you to swap out equivalent  
pieces even though the overall C code remains largely unchanged. In  
fact, optimization is one major area where code might not be  
portable, because what is optimal for one platform might be terribly  
inefficient for another.

You can't learn this without diving in, but I'd suggest working on  
open source "in place" for a while in order to become familiar with  
it before trying to port to a new platform. You can also play around  
with simpler code on the new platform until you're ready to try to  
get a large code base running.

Brian Willoughby
Sound Consulting





From ka4hjh at gmail.com  Fri Apr 26 20:10:18 2013
From: ka4hjh at gmail.com (KA4HJH)
Date: Fri, 26 Apr 2013 14:10:18 -0400
Subject: [sdiy] What to watch out for when buying Nixies?
In-Reply-To: <CA+9GZUi-79XZ5EqGGap_uziszmw_+8JHZDdQq5_2rnn6HJV-fg@mail.gmail.com>
References: <CA+9GZUi-79XZ5EqGGap_uziszmw_+8JHZDdQq5_2rnn6HJV-fg@mail.gmail.com>
Message-ID: <4BD5F958-FA59-4F78-AD0A-DECBB75ADF09@gmail.com>


On Apr 26, 2013, at 6:39 AM, cheater00 . wrote:

> Hi,
> I was offered a fairly cheap piece of equipment (DVM) with nixies.
> What should one watch out for? Can it be that several of the digits
> are burnt out? Anything else?


I was given several pieces of Nixie gear when a friend moved. Some of the tubes have a lot of darkening of the envelopes and could stand to be replaced. One HV supply smoked when a capacitor failed.

Fortunately, there's a lot of NOS around. Off the top of my head:

http://www.sphere.bc.ca/test/nixies.html

http://www.sovtube.com/en/

Plus a bunch of people on ebay.


Terry Bowman, KA4HJH
"The Mac Doctor"



From pata at ieee.org  Sat Apr 27 06:51:15 2013
From: pata at ieee.org (KATAYAMA)
Date: Sat, 27 Apr 2013 13:51:15 +0900
Subject: [sdiy] Anyone Interested in Group-Buying CA3280AE?
In-Reply-To: <714537.10279.qm@web100718.mail.kks.yahoo.co.jp>
References: <714537.10279.qm@web100718.mail.kks.yahoo.co.jp>
Message-ID: <517B5943.1080800@ieee.org>

Sorry to whom inquired

The CA3280AEs are FAKE from UTSOURCE http://www.utsource.net/
So all the requests are canceled.

I have still a few (1 dz) true CA3280AE from Intersil, if anyone need, 
please contact me off-line.

Taku

(2013/04/26 10:38), Takuya Katayama wrote:
> Hi Lists!
>
> Recently, I've gotta some quotations of CA3280AE and I know 500-550JPY each.
> (exclude shipping, tax/customs)
>
> Is there anyone interested in group-buying?
> Or less price?
>
> Taku
>


-- 
=========================================
KATAYAMA, Takuya
Muse Music Synthesizer Laboratory, Japan


From cheater00 at gmail.com  Sat Apr 27 11:14:02 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Sat, 27 Apr 2013 11:14:02 +0200
Subject: [sdiy] Turn anything into a ribbon controller / theremin / etc -
	Drawdio
Message-ID: <CA+9GZUiMoL_XeBgYN6-eHUFeT6ZeSr1B-AEPCurFQPZv1rgOzw@mail.gmail.com>

Hi guys,
only noticed a small note about this from 4 years back, so I thought
I'd bring this up. I wonder if it could be turned into a CV source?
This item is called "drawdio" and it apparently can use resistance
changes that even come from graphite, or leather surface, to detect
what pitch you want. Great idea if you ask me.

http://www.youtube.com/watch?v=PV_w38ldZaE


From dfevans at sekrit.eu  Sat Apr 27 11:29:18 2013
From: dfevans at sekrit.eu (David Evans)
Date: Sat, 27 Apr 2013 10:29:18 +0100
Subject: [sdiy] Turn anything into a ribbon controller / theremin / etc
	- Drawdio
In-Reply-To: <CA+9GZUiMoL_XeBgYN6-eHUFeT6ZeSr1B-AEPCurFQPZv1rgOzw@mail.gmail.com>
References: <CA+9GZUiMoL_XeBgYN6-eHUFeT6ZeSr1B-AEPCurFQPZv1rgOzw@mail.gmail.com>
Message-ID: <B84B1A05-71B1-494E-BB77-A1175C8F074B@sekrit.eu>

On 27 Apr 2013, at 10:14, cheater00 . wrote:

> Hi guys,
> only noticed a small note about this from 4 years back, so I thought
> I'd bring this up. I wonder if it could be turned into a CV source?
> This item is called "drawdio" and it apparently can use resistance
> changes that even come from graphite, or leather surface, to detect
> what pitch you want. Great idea if you ask me.
> 
> http://www.youtube.com/watch?v=PV_w38ldZaE

I was given one of these a few months ago. It is pretty neat but for me does not work as a graphite theremin (it does for others. It's still a neat thing, though. I haven't really used it for anything synth-related.




From cheater00 at gmail.com  Sat Apr 27 12:46:43 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Sat, 27 Apr 2013 12:46:43 +0200
Subject: [sdiy] Turn anything into a ribbon controller / theremin / etc
	- Drawdio
In-Reply-To: <B84B1A05-71B1-494E-BB77-A1175C8F074B@sekrit.eu>
References: <CA+9GZUiMoL_XeBgYN6-eHUFeT6ZeSr1B-AEPCurFQPZv1rgOzw@mail.gmail.com>
	<B84B1A05-71B1-494E-BB77-A1175C8F074B@sekrit.eu>
Message-ID: <CA+9GZUgWDvDtp6yubP50ynnF1HH1OTzK51LwHbyiUPpm_mnYwg@mail.gmail.com>

Hi David,
try a different grade pencil - the softer ones have less graphite in them.

Cheers,
D.

On Sat, Apr 27, 2013 at 11:29 AM, David Evans <dfevans at sekrit.eu> wrote:
> On 27 Apr 2013, at 10:14, cheater00 . wrote:
>
>> Hi guys,
>> only noticed a small note about this from 4 years back, so I thought
>> I'd bring this up. I wonder if it could be turned into a CV source?
>> This item is called "drawdio" and it apparently can use resistance
>> changes that even come from graphite, or leather surface, to detect
>> what pitch you want. Great idea if you ask me.
>>
>> http://www.youtube.com/watch?v=PV_w38ldZaE
>
> I was given one of these a few months ago. It is pretty neat but for me does not work as a graphite theremin (it does for others. It's still a neat thing, though. I haven't really used it for anything synth-related.
>
>


From robkam at ymail.com  Sun Apr 28 10:30:33 2013
From: robkam at ymail.com (Rob Kam)
Date: Sun, 28 Apr 2013 09:30:33 +0100
Subject: [sdiy] SDIY Wiki - books
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
	<CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>
	<CA+9GZUi_jg9BDoRTK_qdoRrCRMwjYPxBz7_MU7moi21GYd=V+w@mail.gmail.com>
	<1366222175.20030.YahooMailNeo@web172501.mail.ir2.yahoo.com>
	<CA+9GZUiH9qinpS_pZfj1-+XPf72wdBySXw5ggs7rGXb0Km4pPQ@mail.gmail.com>
Message-ID: <7304B03AB97546BC8E256769C7CCAC2F@kutair>

The definitive work for electronic music has to be Bernie Hutchins' 
Electronotes. A newsletter published since 1972 and now at about 6000 pages 
(or 3 foot of double sided pages). In-depth information and for all levels 
of reader. With many contributions from leading lights of the synth world. 
http://electronotes.netfirms.com/

----- Original Message ----- 
From: "cheater00 ." <cheater00 at gmail.com>
To: "Rob Kam" <robkam at ymail.com>
Cc: "Tim Parkhurst" <tim.parkhurst at gmail.com>; "synth-diy"
<synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, April 17, 2013 9:59 PM
Subject: Re: [sdiy] SDIY Wiki - books


Hey Rob,
let's worry about the technicalities when we get there.. it's enough
if someone posts links in this thread here.

Cheers,
D.

On Wed, Apr 17, 2013 at 8:09 PM, Rob Kam <robkam at ymail.com> wrote:
> The site won't let you add a link without having first done some other
> edits.
>
> Rob
>
>
> ----- Original Message -----
>> From: cheater00 . <cheater00 at gmail.com>
>> To: Tim Parkhurst <tim.parkhurst at gmail.com>
>> Cc: synth-diy <synth-diy at dropmix.xs4all.nl>
>> Sent: Wednesday, 17 April 2013, 18:45
>> Subject: Re: [sdiy] SDIY Wiki - books
>>
>> No need for long reviews, but something like Adam's short comments
>> could be nice.
>>
>> I'd say you can Servo away. And it's my thread and my lawn. ;-)
>>
>> D.
>>
>> On Wed, Apr 17, 2013 at 6:55 PM, Tim Parkhurst <tim.parkhurst at gmail.com>
>> wrote:
>>>  I can add links to the Thomas Henry books I sell, although I don't
>>>  have many reviews on them (from the emails I get, people seem to enjoy
>>>  them though). I just thought I'd run it by everyone first, as I
>> don't
>>>  want to appear too self-serving.
>>>
>>>
>>>  Tim (one serving of Servo is enough) Servo
>>>  ---
>>>  "Sire, the church of God is an anvil that has worn out many
>> hammers."
>>>  - H.L. Hastings
>>>
>>>
>>>
>>>  On Tue, Apr 16, 2013 at 7:22 AM, cheater00 . <cheater00 at gmail.com>
>> wrote:
>>>>  Hi guys,
>>>>  following Rob's recently announced wiki, I thought it would be a
>> good
>>>>  idea for another round-up of books related to synths, analog design,
>>>>  and anything else of interest. Please post your suggestions like this:
>>>>
>>>>  author - name - short description of why this book is great.
>>>>
>>>>  Once this thread gains momentum, someone can go through the whole
>>>>  thing and add the books to the wiki in an article called
>> "Books"
>>>>
>>>>  If you want you can add info about the year or the isbn (isbn is
>>>>  especially great for obscure books)
>>>>
>>>>  Please don't hesitate to re-post books that have been mentioned
>> already.
>>>>
>>>>  Maybe someone with a lot of time on their hands can go through the
>>>>  archives, search for "book" or "books" or
>> "amazon" or "chapter", and
>>>>  simply round up everything. It would be nice to have such an
>>>>  aggregation of what books have been mentioned previously.
>>>>
>>>>  I hope to kickstart some sort of collaboration and maybe this way we
>>>>  can start doing more stuff together! That would be really cool..
>>>>
>>>>  Cheers,
>>>>  D.
>>>>  _______________________________________________
>>>>  Synth-diy mailing list
>>>>  Synth-diy at dropmix.xs4all.nl
>>>>  http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>



From cheater00 at gmail.com  Sun Apr 28 11:43:34 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Sun, 28 Apr 2013 11:43:34 +0200
Subject: [sdiy] SDIY Wiki - books
In-Reply-To: <7304B03AB97546BC8E256769C7CCAC2F@kutair>
References: <CA+9GZUjrBDxQQHsJMHHd9xHpdR_dO6yVpSUMwsVcgqcvdRV6Xw@mail.gmail.com>
	<CACDGQT_annr8eAdGcTYrO5pywd_ykcS1xok5xZYTEppguyxVMw@mail.gmail.com>
	<CA+9GZUi_jg9BDoRTK_qdoRrCRMwjYPxBz7_MU7moi21GYd=V+w@mail.gmail.com>
	<1366222175.20030.YahooMailNeo@web172501.mail.ir2.yahoo.com>
	<CA+9GZUiH9qinpS_pZfj1-+XPf72wdBySXw5ggs7rGXb0Km4pPQ@mail.gmail.com>
	<7304B03AB97546BC8E256769C7CCAC2F@kutair>
Message-ID: <CA+9GZUhTye3X=1pBSyeQLZ9yR+C-EdZNVp4ZAhnQm6BrPT9+zA@mail.gmail.com>

Thanks, Rob!

On Sun, Apr 28, 2013 at 10:30 AM, Rob Kam <robkam at ymail.com> wrote:
> The definitive work for electronic music has to be Bernie Hutchins'
> Electronotes. A newsletter published since 1972 and now at about 6000 pages
> (or 3 foot of double sided pages). In-depth information and for all levels
> of reader. With many contributions from leading lights of the synth world.
> http://electronotes.netfirms.com/
>
> ----- Original Message -----
> From: "cheater00 ." <cheater00 at gmail.com>
> To: "Rob Kam" <robkam at ymail.com>
> Cc: "Tim Parkhurst" <tim.parkhurst at gmail.com>; "synth-diy"
> <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, April 17, 2013 9:59 PM
> Subject: Re: [sdiy] SDIY Wiki - books
>
>
> Hey Rob,
> let's worry about the technicalities when we get there.. it's enough
> if someone posts links in this thread here.
>
> Cheers,
> D.
>
> On Wed, Apr 17, 2013 at 8:09 PM, Rob Kam <robkam at ymail.com> wrote:
>> The site won't let you add a link without having first done some other
>> edits.
>>
>> Rob
>>
>>
>> ----- Original Message -----
>>> From: cheater00 . <cheater00 at gmail.com>
>>> To: Tim Parkhurst <tim.parkhurst at gmail.com>
>>> Cc: synth-diy <synth-diy at dropmix.xs4all.nl>
>>> Sent: Wednesday, 17 April 2013, 18:45
>>> Subject: Re: [sdiy] SDIY Wiki - books
>>>
>>> No need for long reviews, but something like Adam's short comments
>>> could be nice.
>>>
>>> I'd say you can Servo away. And it's my thread and my lawn. ;-)
>>>
>>> D.
>>>
>>> On Wed, Apr 17, 2013 at 6:55 PM, Tim Parkhurst <tim.parkhurst at gmail.com>
>>> wrote:
>>>>  I can add links to the Thomas Henry books I sell, although I don't
>>>>  have many reviews on them (from the emails I get, people seem to enjoy
>>>>  them though). I just thought I'd run it by everyone first, as I
>>> don't
>>>>  want to appear too self-serving.
>>>>
>>>>
>>>>  Tim (one serving of Servo is enough) Servo
>>>>  ---
>>>>  "Sire, the church of God is an anvil that has worn out many
>>> hammers."
>>>>  - H.L. Hastings
>>>>
>>>>
>>>>
>>>>  On Tue, Apr 16, 2013 at 7:22 AM, cheater00 . <cheater00 at gmail.com>
>>> wrote:
>>>>>  Hi guys,
>>>>>  following Rob's recently announced wiki, I thought it would be a
>>> good
>>>>>  idea for another round-up of books related to synths, analog design,
>>>>>  and anything else of interest. Please post your suggestions like this:
>>>>>
>>>>>  author - name - short description of why this book is great.
>>>>>
>>>>>  Once this thread gains momentum, someone can go through the whole
>>>>>  thing and add the books to the wiki in an article called
>>> "Books"
>>>>>
>>>>>  If you want you can add info about the year or the isbn (isbn is
>>>>>  especially great for obscure books)
>>>>>
>>>>>  Please don't hesitate to re-post books that have been mentioned
>>> already.
>>>>>
>>>>>  Maybe someone with a lot of time on their hands can go through the
>>>>>  archives, search for "book" or "books" or
>>> "amazon" or "chapter", and
>>>>>  simply round up everything. It would be nice to have such an
>>>>>  aggregation of what books have been mentioned previously.
>>>>>
>>>>>  I hope to kickstart some sort of collaboration and maybe this way we
>>>>>  can start doing more stuff together! That would be really cool..
>>>>>
>>>>>  Cheers,
>>>>>  D.
>>>>>  _______________________________________________
>>>>>  Synth-diy mailing list
>>>>>  Synth-diy at dropmix.xs4all.nl
>>>>>  http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From don at till.com  Sun Apr 28 18:04:09 2013
From: don at till.com (Donald Tillman)
Date: Sun, 28 Apr 2013 09:04:09 -0700
Subject: [sdiy] OTA as Voltage Controlled Resistor
In-Reply-To: <CAP92RBWhKfWQLKkc1c+u=4-k_FKrnJX_U0wYCu=s5Oq6=4NYZQ@mail.gmail.com>
References: <5178336d.a163b40a.4225.1a7e@mx.google.com>
	<9754CD56-1CF7-44E8-B4EF-2272C80AE0DA@till.com>
	<CAP92RBWhKfWQLKkc1c+u=4-k_FKrnJX_U0wYCu=s5Oq6=4NYZQ@mail.gmail.com>
Message-ID: <3372009D-8A31-46AF-B876-B77670494A79@till.com>

On Apr 27, 2013, at 10:41 AM, Mattias Rickardsson <mr at analogue.org> wrote:

> > Yes, but... it wouldn't have the quirks that make the vactrol circuit charming, replacing them with these new OTA quirks.
> 
> Which quirks does the OTA solution have?


Let's see; off the top of my head:

   * The linearity of the OTA.

   * And the more extreme case, the situation where the OTA input gets overdriven.

   * Limitations on the output current of the OTA.

   * The characteristics of the OTA output driving into a voltage that's not ground.

   * The characteristics of the darlington transistors that are used to sample the voltages.

   * The current that the voltage sampling steals.

I'm sure there are more.

Every implementation has quirks.  Musicians have a tendency to find and apply those quirks just as much as they use the original intended function.

Note that a little later in the LM13700 data sheet, the schematic for the voltage controlled low pass filter looks very much like the single ended voltage controlled resistor.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com






From cheater00 at gmail.com  Sun Apr 28 21:43:47 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Sun, 28 Apr 2013 21:43:47 +0200
Subject: [sdiy]  Reverse-polarity NEMA-1 plug or cable?
Message-ID: <CA+9GZUjbWONyFk3egdL=QaRMgeP+ZbMHPhJ5g8ZizzAWkehdAA@mail.gmail.com>

Hi guys,
I am looking for a fairly esoteric cable for my Br?el & Kjaer 2423. In
the back it has a 2.9 cm diameter hole which is maybe 1.5 cm deep,
with two rectangular blades that are 2cm long. They're the kind that
are panel-mounted and might have turned actually, but currently they
are in an exact NEMA-1 configuration, down to the milimeter. So I
think this is a receptacle for a NEMA-1 extension cord, which should
plug in and provide power. Except the wall plug should be a Schuko..
and the cable should be rated for 230V of course. I think the plug
might look something like this:

http://www.sayal.com/images_c/PQD-1203.JPG

except there's no ground lug, and the two lugs are centred, not
shifted up. So maybe a little more like this:

http://www.goodpex.com/d/file/LED_Technology/LED_Basic_Knowledge%26Glossary/2010-07-26/1a5ead4ee80d16b545a1bf520f1e5831.jpg

I would be thankful if anyone had a tip.

Also, I wonder if a cheap alternative could be a simple rectangular
NEMA-1 plug, like those Korg cables. Maybe the actual plug was
rectangular, but a circular hole punch was used for ease of
manufacturing.

Are any NEMA-1 plugs rated for 230V?

Cheers,
D.


From minimoog1 at hotmail.com  Mon Apr 29 06:43:40 2013
From: minimoog1 at hotmail.com (geoff james)
Date: Mon, 29 Apr 2013 15:13:40 +1030
Subject: [sdiy] Minimoog CCT boards
Message-ID: <BLU162-W30FF2218549DC83E62B7F6F7B20@phx.gbl>

Hi , all A house moving incident saw my 4 Minimoog cct boards end in a landfill.
I have purchased the VCO and Contour boards , but need the Filter #4 and PSU/Noise #3 boards.
Any help is appreciated---anyone know of a source?
Regards
Geoff 		 	   		  

From rominbayol at gmail.com  Mon Apr 29 11:05:06 2013
From: rominbayol at gmail.com (Robyn Mayol)
Date: Mon, 29 Apr 2013 19:05:06 +1000
Subject: [sdiy] Minimoog CCT boards
In-Reply-To: <BLU162-W30FF2218549DC83E62B7F6F7B20@phx.gbl>
References: <BLU162-W30FF2218549DC83E62B7F6F7B20@phx.gbl>
Message-ID: <F792E77B-629C-4519-867F-CF6DF059BCE1@gmail.com>

> Hi , all A house moving incident saw my 4 Minimoog cct boards end in a landfill.

I feel for you brother.

Don't know of any source but this mailing list is called Synth DIY so why not get into the crazy project of rebuilding your boards yourself?
Here is a source for schematics and components list: http://www.fantasyjackpalance.com/fjp/sound/synth/synthdata/16-moog-minimoog.html#3b

From cheater00 at gmail.com  Mon Apr 29 11:53:49 2013
From: cheater00 at gmail.com (cheater00 .)
Date: Mon, 29 Apr 2013 11:53:49 +0200
Subject: [sdiy] Minimoog CCT boards
In-Reply-To: <F792E77B-629C-4519-867F-CF6DF059BCE1@gmail.com>
References: <BLU162-W30FF2218549DC83E62B7F6F7B20@phx.gbl>
	<F792E77B-629C-4519-867F-CF6DF059BCE1@gmail.com>
Message-ID: <CA+9GZUgnbBr6vZSZmPm7xiBapfueBzLJFxGkrPP8oPuO0MUzMQ@mail.gmail.com>

I love how the PSU is the noise source.

Signed,
noise source.

On Mon, Apr 29, 2013 at 11:05 AM, Robyn Mayol <rominbayol at gmail.com> wrote:
>> Hi , all A house moving incident saw my 4 Minimoog cct boards end in a landfill.
>
> I feel for you brother.
>
> Don't know of any source but this mailing list is called Synth DIY so why not get into the crazy project of rebuilding your boards yourself?
> Here is a source for schematics and components list: http://www.fantasyjackpalance.com/fjp/sound/synth/synthdata/16-moog-minimoog.html#3b
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From keithwin at me.com  Mon Apr 29 15:00:11 2013
From: keithwin at me.com (Keith Winstanley)
Date: Mon, 29 Apr 2013 14:00:11 +0100
Subject: [sdiy] Minimoog CCT boards
In-Reply-To: <BLU162-W30FF2218549DC83E62B7F6F7B20@phx.gbl>
References: <BLU162-W30FF2218549DC83E62B7F6F7B20@phx.gbl>
Message-ID: <E240AE58-5648-40CC-B0D2-A746CE07CD67@me.com>

How many are you building?
:)

KW

On 29 Apr 2013, at 05:43, geoff james <minimoog1 at hotmail.com> wrote:

> Hi , all A house moving incident saw my 4 Minimoog cct boards end in a landfill.
> I have purchased the VCO and Contour boards , but need the Filter #4 and PSU/Noise #3 boards.
> Any help is appreciated---anyone know of a source?
> Regards
> Geoff                         
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


From lanterma at ece.gatech.edu  Mon Apr 29 22:33:58 2013
From: lanterma at ece.gatech.edu (Lanterman, Aaron)
Date: Mon, 29 Apr 2013 20:33:58 +0000
Subject: [sdiy] OTA as Voltage Controlled Resistor
In-Reply-To: <5178336d.a163b40a.4225.1a7e@mx.google.com>
References: <5178336d.a163b40a.4225.1a7e@mx.google.com>
Message-ID: <CFCA1EC28F59FC4CAC2F5B8CE35E798573F4599E@apatlisdmbx01>


On Apr 24, 2013, at 3:33 PM, Justin Owen <juzowen at gmail.com> wrote:

> The LM13700 data sheet shows a schem (Fig. 10) for a 'Floating Voltage Controlled Resistor' - this seems to be a double-ended circuit as opposed to the FET-based circuits (and the the LM13700 circuit in Fig. 9) which (from memory) are single-ended.
> 
> My questions...
> 
> 1) Can the double-ended circuit be used to replace a standard discrete resistor - i.e. is either 'end' replacing a leg/pin of a resistor?


I've had students off-and-on over the years experiment with the double-ended version. It never worked out quite the way they hoped.

- Aaron

From music.maker at gte.net  Mon Apr 29 23:17:38 2013
From: music.maker at gte.net (Scott Gravenhorst)
Date: Mon, 29 Apr 2013 14:17:38 -0700
Subject: [sdiy] OTA as Voltage Controlled Resistor
Message-ID: <201304292117.r3TLHce3008060@linux7.lan>


"Lanterman, Aaron" <lanterma at ece.gatech.edu> wrote:
>
>On Apr 24, 2013, at 3:33 PM, Justin Owen <juzowen at gmail.com> wrote:
>
>> The LM13700 data sheet shows a schem (Fig. 10) for a 'Floating 
>Voltage Controlled Resistor' - this seems to be a double-ended 
>circuit as opposed to the FET-based circuits (and the the LM13700 
>circuit in Fig. 9) which (from memory) are single-ended. > > My 
>questions... > > 1) Can the double-ended circuit be used to 
>replace a standard discrete resistor - i.e. is either 'end' 
>replacing a leg/pin of a resistor? 
>
>
>I've had students off-and-on over the years experiment with the 
>double-ended version. It never worked out quite the way they 
>hoped. 

Interesting.  I have to wonder if there's a way to analyze this particular
circuit to understand what applications can use it.  What I see (with my non-EE
eyes) is a bridge amplifier with variable gain controlled by Iabc of the two
amplifiers.  The "resistance" supplied would appear to me (again with my non-EE
eyes) to be coming from the fact that Iabc is controlling the output ampifiers'
output current, that is, the "resistance" is being created by the fact that
current flow through the OTA output transistors (a totem-pole so to speak) is
limited or controlled by Iabc.  But the totem-pole output structure is not just
a single transistor, it is two (one from V+ to out, one from out to ground) with
each OTA operating as a sort of potentiometer.  As such, I see this circuit as
not really "floating resistor", but sort of a simulation in some respects of
that.  Is my dual potentiometer view of this a possible analysis method?  I have
a feeling that the circuit works best when small currents are needed.  This
would keep the resistance of each totem-pole transistor to be close to the
resistance of it's "paired" transistor.  As such, I would expect a rather small
range of usefulness.

For the third time, I am not an EE, what I wrote above could be total
unmitigated bullshit so please be kind.  (c:

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
-- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
-- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
-- When the going gets tough, the tough use the command line.



From music.maker at gte.net  Mon Apr 29 23:24:47 2013
From: music.maker at gte.net (Scott Gravenhorst)
Date: Mon, 29 Apr 2013 14:24:47 -0700
Subject: [sdiy] OTA as Voltage Controlled Resistor
Message-ID: <201304292124.r3TLOlpg009206@linux7.lan>


music.maker at gte.net wrote:
>
>"Lanterman, Aaron" <lanterma at ece.gatech.edu> wrote:
>>
>>On Apr 24, 2013, at 3:33 PM, Justin Owen <juzowen at gmail.com> wrote:
>>
>>> The LM13700 data sheet shows a schem (Fig. 10) for a 'Floating 
>>Voltage Controlled Resistor' - this seems to be a double-ended 
>>circuit as opposed to the FET-based circuits (and the the LM13700 
>>circuit in Fig. 9) which (from memory) are single-ended. > > My 
>>questions... > > 1) Can the double-ended circuit be used to 
>>replace a standard discrete resistor - i.e. is either 'end' 
>>replacing a leg/pin of a resistor? 
>>
>>
>>I've had students off-and-on over the years experiment with the 
>>double-ended version. It never worked out quite the way they 
>>hoped. 
>
>Interesting.  I have to wonder if there's a way to analyze this particular
>circuit to understand what applications can use it.  What I see (with my non-EE
>eyes) is a bridge amplifier with variable gain controlled by Iabc of the two
>amplifiers.  The "resistance" supplied would appear to me (again with my non-EE
>eyes) to be coming from the fact that Iabc is controlling the output ampifiers'
>output current, that is, the "resistance" is being created by the fact that
>current flow through the OTA output transistors (a totem-pole so to speak) is
>limited or controlled by Iabc.  But the totem-pole output structure is not just
>a single transistor, it is two 

>(one from V+ to out, one from out to ground) 

OOPS -- one from V+ to out, one from out to V- ...  sorry...

>with each OTA operating as a sort of potentiometer.  As such, I see this circuit as
>not really "floating resistor", but sort of a simulation in some respects of
>that.  Is my dual potentiometer view of this a possible analysis method?  I have
>a feeling that the circuit works best when small currents are needed.  This
>would keep the resistance of each totem-pole transistor to be close to the
>resistance of it's "paired" transistor.  As such, I would expect a rather small
>range of usefulness.
>
>For the third time, I am not an EE, what I wrote above could be total
>unmitigated bullshit so please be kind.  (c:
>
>-- ScottG
>________________________________________________________________________
>-- Scott Gravenhorst
>-- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
>-- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
>-- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
>-- When the going gets tough, the tough use the command line.
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
-- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
-- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
-- When the going gets tough, the tough use the command line.



From lanterma at ece.gatech.edu  Tue Apr 30 00:51:31 2013
From: lanterma at ece.gatech.edu (Lanterman, Aaron)
Date: Mon, 29 Apr 2013 22:51:31 +0000
Subject: [sdiy] Tonecore DSP [was: Re: The Owl: ARM fx pedal]
In-Reply-To: <931FD6D3-5F8D-4562-B7B6-C5D0525DB0C6@pingdynasty.com>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<5177FA4C.9060302@gmail.com>
	<931FD6D3-5F8D-4562-B7B6-C5D0525DB0C6@pingdynasty.com>
Message-ID: <CFCA1EC28F59FC4CAC2F5B8CE35E798573F463ED@apatlisdmbx01>


On Apr 24, 2013, at 1:16 PM, Martin Klang <mars at pingdynasty.com> wrote:

> the ToneCore looks like good hardware, I've not used it but it does seem to require very specialised skills to program.

Incidentally, it looks like the DSP in the ToneCore is "not recommended for new designs" by Freescale.

- Aaron

From thx1138 at earthlink.net  Tue Apr 30 01:43:45 2013
From: thx1138 at earthlink.net (Terry Shultz)
Date: Mon, 29 Apr 2013 16:43:45 -0700
Subject: [sdiy] Tonecore DSP [was: Re: The Owl: ARM fx pedal]
In-Reply-To: <CFCA1EC28F59FC4CAC2F5B8CE35E798573F463ED@apatlisdmbx01>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<5177FA4C.9060302@gmail.com>
	<931FD6D3-5F8D-4562-B7B6-C5D0525DB0C6@pingdynasty.com>
	<CFCA1EC28F59FC4CAC2F5B8CE35E798573F463ED@apatlisdmbx01>
Message-ID: <39D81AFF-32E4-404D-BE01-4AD388147833@earthlink.net>

Hi Aaron and folks,

All of the DSP's in the DSP56xxx are at the end of the design generation as "StandAlone" devices according to Marketing at Freescale.

There may be re-use of the core in a "SOC" design if there is a need for it. I personally would not count on the devices being available after the next 5-6 years as orders will dwindle and at some point , the devices are considered end of life.

The DSPx5672x Dual Core devices are @ 90 nm and are under the 10 year longevity program from launch of the device. Hence maybe 6 to 7 years with EOL notice. I can only repeat what I was told while still employed at Freescale.

I am currently self employed after almost 28 years at Motorola/Freescale Semiconductor.

The DSP56364  uses the same core as the DSPx56362/366/367 devices. The DSPx56371/374 use a newer version of the DSP core modeled from the DSP56311. Just a different memory and I/O configuration.

My suggestion is to use the Cortex M4 or Cortex A series ARM instead and focus on a single engine for programming.

Mixed DSP and MCU/ARM is a much more advanced project and is difficult to support in an open forum as I discovered with the Tone Core project.


best always,
Terry Shultz
thx1138 at earthlink.net



On Apr 29, 2013, at 3:51 PM, "Lanterman, Aaron" <lanterma at ece.gatech.edu> wrote:

> 
> On Apr 24, 2013, at 1:16 PM, Martin Klang <mars at pingdynasty.com> wrote:
> 
>> the ToneCore looks like good hardware, I've not used it but it does seem to require very specialised skills to program.
> 
> Incidentally, it looks like the DSP in the ToneCore is "not recommended for new designs" by Freescale.
> 
> - Aaron
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy



From djthomaswhite at yahoo.com  Tue Apr 30 07:48:38 2013
From: djthomaswhite at yahoo.com (Thomas White)
Date: Mon, 29 Apr 2013 22:48:38 -0700
Subject: [sdiy] Pieces up for you
Message-ID: <0B5AC7EE-EC98-4F07-9B73-DE0B21DE85E1@yahoo.com>

MOTM-110 Ring Mod/VCA $200

Oakley VC-ADSR/VCA (original Bridechamber panel with long/short switch mod and LED) $200

Oakley Quad CV Source/Attenuators (reversing) in FPE panel $150

Electro Harmonix Clone Theory (new style, lovely on poly synths) Stereo Analog Chorus in Box $60

MOTM Wood Rack Case. Warm stain, hand drilled Rails with brass inserts, includes power supply distribution wiring (pick up only, Orange County, California) $200

Contact privately if interested or for details and pictures. Buyer pays shipping. Multiple item discount. Thanks!

Thomas White
Natural Rhythm Music
www.naturalrhythmmusic.com

From juzowen at gmail.com  Tue Apr 30 12:48:16 2013
From: juzowen at gmail.com (Justin Owen)
Date: Tue, 30 Apr 2013 11:48:16 +0100
Subject: [sdiy] OTA as Voltage Controlled Resistor
Message-ID: <517fa172.440ab40a.028f.259b@mx.google.com>

-----Original Message-----
From: Lanterman, Aaron [lanterma at ece.gatech.edu]

>> The LM13700 data sheet shows a schem (Fig. 10) for a 'Floating Voltage Controlled Resistor' - this seems to be a double-ended circuit as opposed to the FET-based circuits (and the the LM13700 circuit in Fig. 9) which (from memory) are single-ended.
>> 
>> My questions...
>> 
>> 1) Can the double-ended circuit be used to replace a standard discrete resistor - i.e. is either 'end' replacing a leg/pin of a resistor?


> I've had students off-and-on over the years experiment with the double-ended version. It never worked out quite the way they hoped.


Hi Aaron,

Any idea why this was?

Thanks



From mars at pingdynasty.com  Tue Apr 30 12:52:55 2013
From: mars at pingdynasty.com (Martin Klang)
Date: Tue, 30 Apr 2013 11:52:55 +0100
Subject: [sdiy] The Owl: ARM fx pedal
In-Reply-To: <03332A95-D60F-4E31-B124-38AB76FF43BF@earthlink.net>
References: <0E987565-A391-4299-A350-0BCF3BFA8921@pingdynasty.com>
	<3D43E6EC-3439-434D-8FEA-469E10E9A34E@earthlink.net>
	<03332A95-D60F-4E31-B124-38AB76FF43BF@earthlink.net>
Message-ID: <CA3E1927-FD0E-4963-9025-4E21C626D191@pingdynasty.com>


Thanks for sharing Terry, that's very interesting.

best,

Martin

On 25 Apr 2013, at 16:07, Terry Shultz wrote:

> Hi Martin,
> 
> Here are some presentation we made for the ToneCore and SymphonyBite.
> 
> <Create,_Compile_and_Debug_Your_Own_Audio_Effect_with_the_New_ToneCore?_Developers_Kit_from_Line6.ppt.pdf><Hands-on_Workshop_Fast_Track_Product_Designs_with_the_New_Symphony_DSP_Development_Tools.ppt.pdf>
> 
> 
> 
> Terry Shultz
> thx1138 at earthlink.net



