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RE: Re: [Doepfer_a100] wish 4 a offset generator

RE: Re: [Doepfer_a100] wish 4 a offset generator

2002-02-28 by martin olson

Is it just me and Florian who like to see this module in production, i want some feedback please, maybe even a poll created on the subject.

This is -in my point of view - the missing link in the Doepfer lineup. 

Activit�t, por favor ///dnfn////

> Doepfer_a100@yahoogroups.com Florian Anwander <Florian.Anwander@consol.de>Date: Thu, 28 Feb 2002 11:00:37 +0100
> Re: [Doepfer_a100] wish 4 a offset generatorReply-To: Doepfer_a100@yahoogroups.com
>
>Hi martin 
>
>> offsetgenerator-mixer-attenuator-like-module. 
>Very good idea. We had this suggestion here already half a year ago.
>Until now, I modified my linear mixer module that way, that the lowest jack
>is connected via its switching contact to +5 Volts. This helps already a
>little bit. 
>But a general attenuator / amplifier / offset generator would be great. 
>
>The schematic is very simple. It is mainly the mechanic affort.
>
>Florian
>-- 
>Florian Anwander                  |ConSol*  HP-Support
>Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
>Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 M�nchen
>email: florian.anwander@consol.de |http://www.consol.de
>
>
>To unsubscribe from this group, send an email to:
>doepfer_a100-unsubscribe@yahoogroups.com
>
> 
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 


------------------------------------------------------------
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Re: [Doepfer_a100] wish 4 a offset generator

2002-02-28 by synth_freak_2000

hi martin,
i didn't say that i don't want an offset/attenuator module,i just 
don't understand what will be the difference between this and the 
a129/3...
bakis.






-- In Doepfer_a100@y..., "martin olson" <martin@t...> wrote:
> Is it just me and Florian who like to see this module in 
production, i want some feedback please, maybe even a poll created on 
the subject.
> 
> This is -in my point of view - the missing link in the Doepfer 
lineup. 
> 
> Activität, por favor ///dnfn////
> 
> > Doepfer_a100@y... Florian Anwander <Florian.Anwander@c...>Date: 
Thu, 28 Feb 2002 11:00:37 +0100
> > Re: [Doepfer_a100] wish 4 a offset generatorReply-To: 
Doepfer_a100@y...
> >
> >Hi martin 
> >
> >> offsetgenerator-mixer-attenuator-like-module. 
> >Very good idea. We had this suggestion here already half a year 
ago.
> >Until now, I modified my linear mixer module that way, that the 
lowest jack
> >is connected via its switching contact to +5 Volts. This helps 
already a
> >little bit. 
> >But a general attenuator / amplifier / offset generator would be 
great. 
> >
> >The schematic is very simple. It is mainly the mechanic affort.
> >
> >Florian
> >-- 
> >Florian Anwander                  |ConSol*  HP-Support
> >Tel.   +49.89.45841-133           |Consulting&Solutions Software 
GmbH
> >Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 
München
> >email: florian.anwander@c... |http://www.consol.de
> >
> >
> >To unsubscribe from this group, send an email to:
> >doepfer_a100-unsubscribe@y...
> >
> > 
> >
> >Your use of Yahoo! Groups is subject to 
http://docs.yahoo.com/info/terms/ 
> 
> 
> ------------------------------------------------------------
> wood.  fire.  hand.  go.  http://www.bullseyeart.com 
> 
> 
> --------------------------------------------------------------------
-
> Express yourself with a super cool email address from 
BigMailBox.com.
> Hundreds of choices. It's free!
> http://www.bigmailbox.com
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Re: [Doepfer_a100] wish 4 a offset generator

2002-03-01 by Florian Anwander

Hi martin 

> Is it just me and Florian who like to see this module in production, 
> i want some feedback please, maybe even a poll created on the subject.
I have to admit, that I would not buy it, since I can build it on my own.



Nevertheless I'd suggest some features:

It should contain three channels. Two of them look like:
- One cv input, 
- One linear Potentiometer that attenuates or amplifies the signal. The 
  signal in put should not be dc-compensated. This means if there is 
  already an dc-offset it should be fed through.
- One linear Potentiometer that selects a dc-offset between -5/+5Volts. The 
  offset should be added after (!) the amplifier of the CV-Input. (This
means 
  a second op-Amp vulgo some cents more to spend)
- A switch, which pulls down the offset to a lower range (0.5/+0.5 Volts)
- One CV-Output.

The third channel should only contain 
- cv input
- Amplification/Attenuation Potentiometer
- cv output

The three output jacks should be connected to each other via the switching
contacts, so if only the third output is plugged, then the module works
additionally as CV-Mixer

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-01 by bakis Sirros

hi florian,
very interesting...that means another poll...
bakis.

--- Florian Anwander <Florian.Anwander@consol.de>
wrote:
> Hi martin 
> 
> > Is it just me and Florian who like to see this
> module in production, 
> > i want some feedback please, maybe even a poll
> created on the subject.
> I have to admit, that I would not buy it, since I
> can build it on my own.
> 
> 
> 
> Nevertheless I'd suggest some features:
> 
> It should contain three channels. Two of them look
> like:
> - One cv input, 
> - One linear Potentiometer that attenuates or
> amplifies the signal. The 
>   signal in put should not be dc-compensated. This
> means if there is 
>   already an dc-offset it should be fed through.
> - One linear Potentiometer that selects a dc-offset
> between -5/+5Volts. The 
>   offset should be added after (!) the amplifier of
> the CV-Input. (This
> means 
>   a second op-Amp vulgo some cents more to spend)
> - A switch, which pulls down the offset to a lower
> range (0.5/+0.5 Volts)
> - One CV-Output.
> 
> The third channel should only contain 
> - cv input
> - Amplification/Attenuation Potentiometer
> - cv output
> 
> The three output jacks should be connected to each
> other via the switching
> contacts, so if only the third output is plugged,
> then the module works
> additionally as CV-Mixer
> 
> Florian
> -- 
> Florian Anwander                  |ConSol* 
> HP-Support
> Tel.   +49.89.45841-133          
> |Consulting&Solutions Software GmbH
> Fax    +49.89.45841-139           |Franziskanerstr.
> 38, D-81669 M�nchen
> email: florian.anwander@consol.de
> |http://www.consol.de
> 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

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Re: [Doepfer_a100] wish 4 a offset generator

2002-03-01 by Florian Anwander

Hi Bakis 

> very interesting...that means another poll...
Please don't always do a poll immediately. I think we should discuss here
wether something is making sense or not. When we have reduced the
discussion to two or three possible choices, then we should start a poll.

Only in Italy they do a new election each time a new possible candidate
appears on the screen ;))

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-01 by Andreas Lindholm

I agree with Florian, we have to many immature polls. That is polls that
would have been more precise if we had narrowed it down by some debate
first. Now to the offset generator. I may be a little wrong here, but I
don't see much that the vocoder module three can't do. Further more the
vocoder/3 does five separate channels and I think it is invaluable and
actually justifies the high price. You don't get that from me too often, do
you? I first thought it was overpriced for the vocoder bit, but now listen
up her Bakis.

I use my A129/3 increase to low gate signals from other gear such as my
Sh101 and Syntechno TeeBee. It is also useful if say I have an lfo that I
want to make a positive lfo going from say +0,2 to +0,6 volts rather that +4
and -4. Then you can have another cv from say an envelope and make that go
from negative to positive... OR whatever you like. This module adds
tremendous control over all kinds of signals in my opionion and if I hadn't
filled up my 6U I would like to have another... Perhaps I should expand with
one in a future system upgrade, but that of course comes way after I have
solved my sequencing setup.

As usual I don't see that a new module is justified here, and if I do want a
new module a graphic VCO or oscilloscope would be much higher on my wish
list. Gotten any response on those from Doepfer Bakis?

/Andreas




----- Original Message -----
Show quoted textHide quoted text
From: "Florian Anwander" <Florian.Anwander@consol.de>
To: <Doepfer_a100@yahoogroups.com>
Sent: Friday, March 01, 2002 4:25 PM
Subject: Re: [Doepfer_a100] wish 4 a offset generator


> Hi Bakis
>
> > very interesting...that means another poll...
> Please don't always do a poll immediately. I think we should discuss here
> wether something is making sense or not. When we have reduced the
> discussion to two or three possible choices, then we should start a poll.
>
> Only in Italy they do a new election each time a new possible candidate
> appears on the screen ;))
>
> Florian
> --
> Florian Anwander                  |ConSol*  HP-Support
> Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
> Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
> email: florian.anwander@consol.de |http://www.consol.de
>
>
> To unsubscribe from this group, send an email to:
> doepfer_a100-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-01 by bakis Sirros

hi andreas,
....the only modules that have a rather big
possibility of being released are the vactrol
phaser/filter and of course ,the sensor keyboard(99%
possibility) and the ribbon controller(99%).
i ,also,would like to see these two modules( that you
mentioned) released.
o...,i remember...dieter told me that the graphic vco,
will possibly not being released as it would be
nothing more than a fader version of the a155.(he told
me that, because,if you clock the a155 from an
a110(and have the a110 track the keyboard from cv1
input) you then have a graphic vco,but you have to
pass the a155 cv from a filter or from  the older
version a130/131 in order to become an AC signal.i
haven't tried it,though.he,also,told me that they have
not tested that function ,but he beleives that the
a155 will work fine up to 10 khz...i tried to clock
the a155 with the a111 but after a while the a155
stopped running(that's possibly because the pulse from
the a111 isn't perfect???)the a155 needs a perfect
pulse signal to recognise as a clock source,but the
new a155's have a small modification that lets them
recognise as clock signals even triangle
wave(!!)signals...i tried to clock the new a155 of
mine,but this mod. prevents the a155 from running at
high/audio speed so i desolder this mod.(it's a
cap+resistor that connects two of the pins of one of
the two chips in the a155 control board(board
4).please,don't try  to change that mod., before you
ask roland mayer for more details( don't destroy a 230
euros module by accident,right??)...
in other words, a graphic vco would be an a155 with a
vco together in one module...
but,i know that the multiple arbitrary function
generator(buchla)must have other functions,too...
it's up to doepfer to decide...(he told me that in the
past he had released a graphic vco ,but,because of the
high price it didn't sell well,that is quite possibly
the reason...),so...?
as for the osciloscope module,we will see,i know
nothing,yet,but to tell you the truth i don't think
that it will be released either,as it will be an
expensive module,too...doepfer decides,as always...


bakis.

--- Andreas Lindholm <andreas.k.lindholm@telia.com>
wrote:
> I agree with Florian, we have to many immature
> polls. That is polls that
> would have been more precise if we had narrowed it
> down by some debate
> first. Now to the offset generator. I may be a
> little wrong here, but I
> don't see much that the vocoder module three can't
> do. Further more the
> vocoder/3 does five separate channels and I think it
> is invaluable and
> actually justifies the high price. You don't get
> that from me too often, do
> you? I first thought it was overpriced for the
> vocoder bit, but now listen
> up her Bakis.
> 
> I use my A129/3 increase to low gate signals from
> other gear such as my
> Sh101 and Syntechno TeeBee. It is also useful if say
> I have an lfo that I
> want to make a positive lfo going from say +0,2 to
> +0,6 volts rather that +4
> and -4. Then you can have another cv from say an
> envelope and make that go
> from negative to positive... OR whatever you like.
> This module adds
> tremendous control over all kinds of signals in my
> opionion and if I hadn't
> filled up my 6U I would like to have another...
> Perhaps I should expand with
> one in a future system upgrade, but that of course
> comes way after I have
> solved my sequencing setup.
> 
> As usual I don't see that a new module is justified
> here, and if I do want a
> new module a graphic VCO or oscilloscope would be
> much higher on my wish
> list. Gotten any response on those from Doepfer
> Bakis?
> 
> /Andreas
> 
> 
> 
> 
> ----- Original Message -----
> From: "Florian Anwander"
> <Florian.Anwander@consol.de>
> To: <Doepfer_a100@yahoogroups.com>
> Sent: Friday, March 01, 2002 4:25 PM
> Subject: Re: [Doepfer_a100] wish 4 a offset
> generator
> 
> 
> > Hi Bakis
> >
> > > very interesting...that means another poll...
> > Please don't always do a poll immediately. I think
> we should discuss here
> > wether something is making sense or not. When we
> have reduced the
> > discussion to two or three possible choices, then
> we should start a poll.
> >
> > Only in Italy they do a new election each time a
> new possible candidate
> > appears on the screen ;))
> >
> > Florian
> > --
> > Florian Anwander                  |ConSol* 
> HP-Support
> > Tel.   +49.89.45841-133          
> |Consulting&Solutions Software GmbH
> > Fax    +49.89.45841-139          
> |Franziskanerstr. 38, D-81669 M�nchen
> > email: florian.anwander@consol.de
> |http://www.consol.de
> >
> >
> > To unsubscribe from this group, send an email to:
> > doepfer_a100-unsubscribe@yahoogroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
> 
> 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

__________________________________________________
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Yahoo! Greetings - Send FREE e-cards for every occasion!
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The graphic VCO

2002-03-02 by Andreas Lindholm

It is interesting that too hear that the A155 could make a graphic VCO with
the standard VCO. Now I find the A155 a bit pricey and I don't really have a
good feeling for "in theory but not tested" so it would be nice to hear if
anybody indeed does pull it off. Anyway I always dreamed of having a graphic
VCO(thus I draw waves on the computer and loop them, if the sampler module
was a bit better I would buy that, but 8 bit is too low for me). I not sure
what kind of graphic LFO Dieter designed, but I sure would like to see the
specs for it.

On the other hand it might have been something totally different from what I
have thought about. As I have pictures it there should be an oscilloscope in
it or even better as a separate module(that can be used with everything in
the A100). Then I have thought about something like 8segments with a
knob/slider and a switch an two jacks for each. The switch and one jack for
selecting the slope (Log/lin/square) the other to set the the value of the
segment end point (the start for the first and the end for the rest). The
jacks of course for cv-control from other modules. 8segments seems more than
sufficent for me, perhaps even 4 could be enough.

What have you guys been dreaming up when thinking "graphic VCO"?

Of course still I think there are other more high on the agenda task that
doepfer should do first.

/Andreas



----- Original Message -----
Show quoted textHide quoted text
From: "bakis Sirros" <synth_freak_2000@yahoo.com>
To: <Doepfer_a100@yahoogroups.com>
Sent: Friday, March 01, 2002 10:56 PM
Subject: Re: [Doepfer_a100] wish 4 a offset generator

> o...,i remember...dieter told me that the graphic vco,
> will possibly not being released as it would be
> nothing more than a fader version of the a155.(he told
> me that, because,if you clock the a155 from an
> a110(and have the a110 track the keyboard from cv1
> input) you then have a graphic vco,but you have to
> pass the a155 cv from a filter or from  the older
> version a130/131 in order to become an AC signal.i
> haven't tried it,though.he,also,told me that they have
> not tested that function ,but he beleives that the
> a155 will work fine up to 10 khz...i tried to clock
> the a155 with the a111 but after a while the a155
> stopped running(that's possibly because the pulse from
> the a111 isn't perfect???)the a155 needs a perfect
> pulse signal to recognise as a clock source,but the
> new a155's have a small modification that lets them
> recognise as clock signals even triangle
> wave(!!)signals...i tried to clock the new a155 of
> mine,but this mod. prevents the a155 from running at
> high/audio speed so i desolder this mod.(it's a
> cap+resistor that connects two of the pins of one of
> the two chips in the a155 control board(board
> 4).please,don't try  to change that mod., before you
> ask roland mayer for more details( don't destroy a 230
> euros module by accident,right??)...
> in other words, a graphic vco would be an a155 with a
> vco together in one module...
> but,i know that the multiple arbitrary function
> generator(buchla)must have other functions,too...
> it's up to doepfer to decide...(he told me that in the
> past he had released a graphic vco ,but,because of the
> high price it didn't sell well,that is quite possibly
> the reason...),so...?
> as for the osciloscope module,we will see,i know
> nothing,yet,but to tell you the truth i don't think
> that it will be released either,as it will be an
> expensive module,too...doepfer decides,as always...
>
>
> bakis.
>
> --- Andreas Lindholm <andreas.k.lindholm@telia.com>
> wrote:
> > I agree with Florian, we have to many immature
> > polls. That is polls that
> > would have been more precise if we had narrowed it
> > down by some debate
> > first. Now to the offset generator. I may be a
> > little wrong here, but I
> > don't see much that the vocoder module three can't
> > do. Further more the
> > vocoder/3 does five separate channels and I think it
> > is invaluable and
> > actually justifies the high price. You don't get
> > that from me too often, do
> > you? I first thought it was overpriced for the
> > vocoder bit, but now listen
> > up her Bakis.
> >
> > I use my A129/3 increase to low gate signals from
> > other gear such as my
> > Sh101 and Syntechno TeeBee. It is also useful if say
> > I have an lfo that I
> > want to make a positive lfo going from say +0,2 to
> > +0,6 volts rather that +4
> > and -4. Then you can have another cv from say an
> > envelope and make that go
> > from negative to positive... OR whatever you like.
> > This module adds
> > tremendous control over all kinds of signals in my
> > opionion and if I hadn't
> > filled up my 6U I would like to have another...
> > Perhaps I should expand with
> > one in a future system upgrade, but that of course
> > comes way after I have
> > solved my sequencing setup.
> >
> > As usual I don't see that a new module is justified
> > here, and if I do want a
> > new module a graphic VCO or oscilloscope would be
> > much higher on my wish
> > list. Gotten any response on those from Doepfer
> > Bakis?
> >
> > /Andreas
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Florian Anwander"
> > <Florian.Anwander@consol.de>
> > To: <Doepfer_a100@yahoogroups.com>
> > Sent: Friday, March 01, 2002 4:25 PM
> > Subject: Re: [Doepfer_a100] wish 4 a offset
> > generator
> >
> >
> > > Hi Bakis
> > >
> > > > very interesting...that means another poll...
> > > Please don't always do a poll immediately. I think
> > we should discuss here
> > > wether something is making sense or not. When we
> > have reduced the
> > > discussion to two or three possible choices, then
> > we should start a poll.
> > >
> > > Only in Italy they do a new election each time a
> > new possible candidate
> > > appears on the screen ;))
> > >
> > > Florian
> > > --
> > > Florian Anwander                  |ConSol*
> > HP-Support
> > > Tel.   +49.89.45841-133
> > |Consulting&Solutions Software GmbH
> > > Fax    +49.89.45841-139
> > |Franziskanerstr. 38, D-81669 München
> > > email: florian.anwander@consol.de
> > |http://www.consol.de
> > >
> > >
> > > To unsubscribe from this group, send an email to:
> > > doepfer_a100-unsubscribe@yahoogroups.com
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> > >
> > >
> >
> >
>
>
> =====
> synthfreak(parallel worlds)
> athens-greece
> [Doepfer_a100] group owner-moderator
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Greetings - Send FREE e-cards for every occasion!
> http://greetings.yahoo.com
>
>
> To unsubscribe from this group, send an email to:
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>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Re: wish 4 a offset generator

2002-03-02 by buechlerjoe

Hi Florian

Your suggestions immediately brought the A135 VC Mixer to my mind. 
Maybe if a couple of +/- offset pots were added to the A135, it 
would be the true "Swiss Army Knife" of modules. Because, as much as I 
use attenuators, four VCAs would be a really useful thing to have, 
plus you'd have the option for attenuation/offset and final mixing.

Joe

--- In Doepfer_a100@y..., Florian Anwander <Florian.Anwander@c...> 
wrote:
> Hi martin 
> 
> > Is it just me and Florian who like to see this module in 
production, 
> > i want some feedback please, maybe even a poll created on the 
subject.
> I have to admit, that I would not buy it, since I can build it on my 
own.
> 
> 
> 
> Nevertheless I'd suggest some features:
> 
> It should contain three channels. Two of them look like:
> - One cv input, 
> - One linear Potentiometer that attenuates or amplifies the signal. 
The 
>   signal in put should not be dc-compensated. This means if there is 
>   already an dc-offset it should be fed through.
> - One linear Potentiometer that selects a dc-offset between 
-5/+5Volts. The 
>   offset should be added after (!) the amplifier of the CV-Input. 
(This
> means 
>   a second op-Amp vulgo some cents more to spend)
> - A switch, which pulls down the offset to a lower range (0.5/+0.5 
Volts)
> - One CV-Output.
> 
> The third channel should only contain 
> - cv input
> - Amplification/Attenuation Potentiometer
> - cv output
> 
> The three output jacks should be connected to each other via the 
switching
> contacts, so if only the third output is plugged, then the module 
works
> additionally as CV-Mixer
> 
> Florian
> -- 
> Florian Anwander                  |ConSol*  HP-Support
> Tel.   +49.89.45841-133           |Consulting&Solutions Software 
GmbH
> Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 
München
> email: florian.anwander@c... |http://www.consol.de

Re: [Doepfer_a100] The graphic VCO

2002-03-02 by bakis Sirros

hi andreas,
i am dreaming of something like the multiple arbitrary
function generator from buchla....
i have tested the a155 in audio freqs.it works!!!but i
haven't tested to hear what the sound it's producing
is like...i mean i haven't pass it thru a filter to
make it a DC signal...
bakis.


--- Andreas Lindholm <andreas.k.lindholm@telia.com>
wrote:
> It is interesting that too hear that the A155 could
> make a graphic VCO with
> the standard VCO. Now I find the A155 a bit pricey
> and I don't really have a
> good feeling for "in theory but not tested" so it
> would be nice to hear if
> anybody indeed does pull it off. Anyway I always
> dreamed of having a graphic
> VCO(thus I draw waves on the computer and loop them,
> if the sampler module
> was a bit better I would buy that, but 8 bit is too
> low for me). I not sure
> what kind of graphic LFO Dieter designed, but I sure
> would like to see the
> specs for it.
> 
> On the other hand it might have been something
> totally different from what I
> have thought about. As I have pictures it there
> should be an oscilloscope in
> it or even better as a separate module(that can be
> used with everything in
> the A100). Then I have thought about something like
> 8segments with a
> knob/slider and a switch an two jacks for each. The
> switch and one jack for
> selecting the slope (Log/lin/square) the other to
> set the the value of the
> segment end point (the start for the first and the
> end for the rest). The
> jacks of course for cv-control from other modules.
> 8segments seems more than
> sufficent for me, perhaps even 4 could be enough.
> 
> What have you guys been dreaming up when thinking
> "graphic VCO"?
> 
> Of course still I think there are other more high on
> the agenda task that
> doepfer should do first.
> 
> /Andreas
> 
> 
> 
> ----- Original Message -----
> From: "bakis Sirros" <synth_freak_2000@yahoo.com>
> To: <Doepfer_a100@yahoogroups.com>
> Sent: Friday, March 01, 2002 10:56 PM
> Subject: Re: [Doepfer_a100] wish 4 a offset
> generator
> 
> > o...,i remember...dieter told me that the graphic
> vco,
> > will possibly not being released as it would be
> > nothing more than a fader version of the a155.(he
> told
> > me that, because,if you clock the a155 from an
> > a110(and have the a110 track the keyboard from cv1
> > input) you then have a graphic vco,but you have to
> > pass the a155 cv from a filter or from  the older
> > version a130/131 in order to become an AC signal.i
> > haven't tried it,though.he,also,told me that they
> have
> > not tested that function ,but he beleives that the
> > a155 will work fine up to 10 khz...i tried to
> clock
> > the a155 with the a111 but after a while the a155
> > stopped running(that's possibly because the pulse
> from
> > the a111 isn't perfect???)the a155 needs a perfect
> > pulse signal to recognise as a clock source,but
> the
> > new a155's have a small modification that lets
> them
> > recognise as clock signals even triangle
> > wave(!!)signals...i tried to clock the new a155 of
> > mine,but this mod. prevents the a155 from running
> at
> > high/audio speed so i desolder this mod.(it's a
> > cap+resistor that connects two of the pins of one
> of
> > the two chips in the a155 control board(board
> > 4).please,don't try  to change that mod., before
> you
> > ask roland mayer for more details( don't destroy a
> 230
> > euros module by accident,right??)...
> > in other words, a graphic vco would be an a155
> with a
> > vco together in one module...
> > but,i know that the multiple arbitrary function
> > generator(buchla)must have other functions,too...
> > it's up to doepfer to decide...(he told me that in
> the
> > past he had released a graphic vco ,but,because of
> the
> > high price it didn't sell well,that is quite
> possibly
> > the reason...),so...?
> > as for the osciloscope module,we will see,i know
> > nothing,yet,but to tell you the truth i don't
> think
> > that it will be released either,as it will be an
> > expensive module,too...doepfer decides,as
> always...
> >
> >
> > bakis.
> >
> > --- Andreas Lindholm
> <andreas.k.lindholm@telia.com>
> > wrote:
> > > I agree with Florian, we have to many immature
> > > polls. That is polls that
> > > would have been more precise if we had narrowed
> it
> > > down by some debate
> > > first. Now to the offset generator. I may be a
> > > little wrong here, but I
> > > don't see much that the vocoder module three
> can't
> > > do. Further more the
> > > vocoder/3 does five separate channels and I
> think it
> > > is invaluable and
> > > actually justifies the high price. You don't get
> > > that from me too often, do
> > > you? I first thought it was overpriced for the
> > > vocoder bit, but now listen
> > > up her Bakis.
> > >
> > > I use my A129/3 increase to low gate signals
> from
> > > other gear such as my
> > > Sh101 and Syntechno TeeBee. It is also useful if
> say
> > > I have an lfo that I
> > > want to make a positive lfo going from say +0,2
> to
> > > +0,6 volts rather that +4
> > > and -4. Then you can have another cv from say an
> > > envelope and make that go
> > > from negative to positive... OR whatever you
> like.
> > > This module adds
> > > tremendous control over all kinds of signals in
> my
> > > opionion and if I hadn't
> > > filled up my 6U I would like to have another...
> > > Perhaps I should expand with
> > > one in a future system upgrade, but that of
> course
> > > comes way after I have
> > > solved my sequencing setup.
> > >
> > > As usual I don't see that a new module is
> justified
> > > here, and if I do want a
> > > new module a graphic VCO or oscilloscope would
> be
> > > much higher on my wish
> > > list. Gotten any response on those from Doepfer
> > > Bakis?
> > >
> > > /Andreas
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Florian Anwander"
> > > <Florian.Anwander@consol.de>
> > > To: <Doepfer_a100@yahoogroups.com>
> > > Sent: Friday, March 01, 2002 4:25 PM
> > > Subject: Re: [Doepfer_a100] wish 4 a offset
> > > generator
> > >
> > >
> > > > Hi Bakis
> > > >
> > > > > very interesting...that means another
> poll...
> > > > Please don't always do a poll immediately. I
> think
> > > we should discuss here
> > > > wether something is making sense or not. When
> we
> > > have reduced the
> > > > discussion to two or three possible choices,
> then
> > > we should start a poll.
> > > >
> > > > Only in Italy they do a new election each time
> a
> > > new possible candidate
> > > > appears on the screen ;))
> > > >
> > > > Florian
> > > > --
> > > > Florian Anwander                  |ConSol*
> 
=== message truncated ===


=====
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[Doepfer_a100] group owner-moderator

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Re: [Doepfer_a100] wish 4 a offset generator

2002-03-04 by Florian Anwander

Hi Andreas 

> I use my A129/3 increase to low gate signals from other gear such as my
> Sh101 and Syntechno TeeBee. 
Do you amplify or do you add only an offset (hoping that the logical low
voltage will be low enough)? I thought the A129/3 cannot amplify a CV - but
I may be wrong.


> As usual I don't see that a new module is justified here, and if I do want a
> new module a graphic VCO or oscilloscope would be much higher on my wish
> list. 
This is true. There are other Module wishes with higher priority on my
list.

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-04 by bakis Sirros

hi florian,
i have the a129/3 and as far as i know,the a129/3 can
ONLY attenuate and offset a signal NOT amplify...
synthfreak



--- Florian Anwander <Florian.Anwander@consol.de>
wrote:
> Hi Andreas 
> 
> > I use my A129/3 increase to low gate signals from
> other gear such as my
> > Sh101 and Syntechno TeeBee. 
> Do you amplify or do you add only an offset (hoping
> that the logical low
> voltage will be low enough)? I thought the A129/3
> cannot amplify a CV - but
> I may be wrong.
> 
> 
> > As usual I don't see that a new module is
> justified here, and if I do want a
> > new module a graphic VCO or oscilloscope would be
> much higher on my wish
> > list. 
> This is true. There are other Module wishes with
> higher priority on my
> list.
> 
> Florian
> -- 
> Florian Anwander                  |ConSol* 
> HP-Support
> Tel.   +49.89.45841-133          
> |Consulting&Solutions Software GmbH
> Fax    +49.89.45841-139           |Franziskanerstr.
> 38, D-81669 M�nchen
> email: florian.anwander@consol.de
> |http://www.consol.de
> 


=====
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athens-greece
[Doepfer_a100] group owner-moderator

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Re: wish 4 a offset generator

2002-03-04 by buechlerjoe

> So this is what I think: a possibility to amplify a CV-Signal is 
really
> missing in the A-100.

Not so. This is one of the many possible uses for the A136 
Distortion/Waveshaper, the other "Swiss Army Knife" module. It can be 
used as a simple attenuator, gain stage, overdrive preamp, voltage 
inverter, external signal booster, trigger modifier, and a tracking 
function generator. Oh, yeah, it also does distortion, and can create 
radical waveshapes from an LFO signal.

Joe

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-04 by Florian Anwander

Hi Bakis 

> i have the a129/3 and as far as i know,the a129/3 can
> ONLY attenuate and offset a signal NOT amplify...
This is my opinion too. ;)

So this is what I think: a possibility to amplify a CV-Signal is really
missing in the A-100. 


Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
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Re: [Doepfer_a100] Re: wish 4 a offset generator

2002-03-04 by Florian Anwander

Hi Joe 

> Not so. This is one of the many possible uses for the A136
> Distortion/Waveshaper, the other "Swiss Army Knife" module. 
I fear, it is again DC-decoupled. This means again: not usable for constant
control voltages!
 
But this should answer Dieter, since I don't have the schematics of the
A-136

Florian


-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-04 by Andreas Lindholm

It must do some kind of amplification since cranking it up indeed did help
me trigger my a100 using sources that it didn't respond to without the
A129/3. I also find it useful for tuning cv-signals that control VCOs if you
split them throught a180 the loose a little signal, this can be finetuned
using said 129/3 to match so you can get more VCOs from the same source.

Mine works this way, if it is a bug it is for once one that I like ;)


----- Original Message -----
Show quoted textHide quoted text
From: "Florian Anwander" <Florian.Anwander@consol.de>
To: <Doepfer_a100@yahoogroups.com>
Sent: Monday, March 04, 2002 3:32 PM
Subject: Re: [Doepfer_a100] wish 4 a offset generator


> Hi Bakis
>
> > i have the a129/3 and as far as i know,the a129/3 can
> > ONLY attenuate and offset a signal NOT amplify...
> This is my opinion too. ;)
>
> So this is what I think: a possibility to amplify a CV-Signal is really
> missing in the A-100.
>
>
> Florian
> --
> Florian Anwander                  |ConSol*  HP-Support
> Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
> Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
> email: florian.anwander@consol.de |http://www.consol.de
>
>
> To unsubscribe from this group, send an email to:
> doepfer_a100-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Re: [Doepfer_a100] Re: wish 4 a offset generator

2002-03-04 by bakis Sirros

hi joe,
please,can you explain further???
bakis.



--- buechlerjoe <buechlerjoe@toadmail.com> wrote:
> > So this is what I think: a possibility to amplify
> a CV-Signal is 
> really
> > missing in the A-100.
> 
> Not so. This is one of the many possible uses for
> the A136 
> Distortion/Waveshaper, the other "Swiss Army Knife"
> module. It can be 
> used as a simple attenuator, gain stage, overdrive
> preamp, voltage 
> inverter, external signal booster, trigger modifier,
> and a tracking 
> function generator. Oh, yeah, it also does
> distortion, and can create 
> radical waveshapes from an LFO signal.
> 
> Joe
> 
> 


=====
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[Doepfer_a100] group owner-moderator

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Re: [Doepfer_a100] wish 4 a offset generator

2002-03-04 by bakis Sirros

hi florian,
when you say "cv-signal amplification"you mean a cv
signal(say an lfo triangle wave) from,for
example,-2.5volts to +2.5volts,to make it -5volts to
+5volts???
bakis.



--- Florian Anwander <Florian.Anwander@consol.de>
wrote:
> Hi Bakis 
> 
> > i have the a129/3 and as far as i know,the a129/3
> can
> > ONLY attenuate and offset a signal NOT amplify...
> This is my opinion too. ;)
> 
> So this is what I think: a possibility to amplify a
> CV-Signal is really
> missing in the A-100. 
> 
> 
> Florian
> -- 
> Florian Anwander                  |ConSol* 
> HP-Support
> Tel.   +49.89.45841-133          
> |Consulting&Solutions Software GmbH
> Fax    +49.89.45841-139           |Franziskanerstr.
> 38, D-81669 M�nchen
> email: florian.anwander@consol.de
> |http://www.consol.de
> 


=====
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[Doepfer_a100] group owner-moderator

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Re: wish 4 a offset generator

2002-03-05 by buechlerjoe

Hi Bakis

The A136 is one of two modules in the A100 lineup that work as a gain 
stage, the other being the A119 External Input module. All of the 
other modules, including the VCAs, only go up to a maximum of unity 
gain. They're attenuators, not amplifiers.

The A136 is designed to handle both audio signals and control 
voltages, so it does the CV amplification that Florian wants. If I 
patch a CV to the A136's input jack, I can adjust the A 
(amplification) knob to:

Gain = -1  - voltage inverter
Zero gain  - total suppression of the signal
Gain < 1   - attenuation
Unity gain - signal pass-through
Gain > 1   - amplification, as Florian wishes for

If I completely suppress the input signal (zero gain), I can then 
set the +A (Positive signal amplification) knob to unity gain, so that 
the CV passes through only if the voltage is above the adjustable 
clipping level. When used with pitch CV, for example, the output only 
begins to rise after a certain note on the keyboard is reached. If 
this "tracking function" is used to modulate the filter, for example, 
then VCF keyboard tracking is only applied to notes in the upper 
registers, bass notes don't have VCF keyboard tracking applied to 
them. This is the same type of thing that you can do on digital 
synths, and even on more modern analog synths like the Matrix 1000.

The A136 could be used instead of the A119 to boost external audio 
signals to the A100 operating level. It can also amplify internal A100 
audio signals in order to "overdrive" a module to induce a traditional 
distorted sound. (the A131 doesn't sound very good when overdriven, 
but I understand that they're other A100 modules that sound very nice 
when you overdrive them).

The A136 can also be used as a +/- CV source.

The rest, I think, can be found in the A136 User's Manual (I'll leave 
the trigger modifier as an exercise, since I haven't actually done 
that yet). I think the A136 could also be made to work as a 
voltage-controlled on/off switch, similar to the A150, but I haven't 
had a chance to try that either.

The A136 documentation contains some errors and ommissions that I 
noted in an earlier thread.

Joe

--- In Doepfer_a100@y..., bakis Sirros <synth_freak_2000@y...> wrote:
Show quoted textHide quoted text
> hi joe,
> please,can you explain further???
> bakis.
> 
> 
> 
> --- buechlerjoe <buechlerjoe@t...> wrote:
> > > So this is what I think: a possibility to amplify
> > a CV-Signal is 
> > really
> > > missing in the A-100.
> > 
> > Not so. This is one of the many possible uses for
> > the A136 
> > Distortion/Waveshaper, the other "Swiss Army Knife"
> > module. It can be 
> > used as a simple attenuator, gain stage, overdrive
> > preamp, voltage 
> > inverter, external signal booster, trigger modifier,
> > and a tracking 
> > function generator. Oh, yeah, it also does
> > distortion, and can create 
> > radical waveshapes from an LFO signal.
> > 
> > Joe
> > 
> > 
> 
> 
> =====
> synthfreak(parallel worlds)
> athens-greece
> [Doepfer_a100] group owner-moderator
> 
> __________________________________________________
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Re: wish 4 a offset generator

2002-03-05 by buechlerjoe

Hi Florian
> I fear, it is again DC-decoupled. This means again: not usable for 
constant
> control voltages!

I've specifially tested the Distortion/Waveshaper with constant 
voltages from the CV source module, and also with pitch CV from the 
A190. It works perfectly. The only glitch is the hard clipping that I 
mentioned back in December, so I frequently have to attenuate control 
voltages before patching them to the A136, and then compensate on the 
output side by adjusting the amplification amount.

Joe

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-05 by Florian Anwander

Hi Andreas 

> It must do some kind of amplification since cranking it up indeed did help
> me trigger my a100 using sources that it didn't respond to without the
> A129/3. 
This must not be. Often a simple impedance change is enough of the gate
signal is enough. For example: my SH-101 does not trigger the A-140, but
sending the 101-Gate through any logic module fixes this.


> I also find it useful for tuning cv-signals that control VCOs if you
> split them throught a180 the loose a little signal, this can be finetuned
> using said 129/3 to match so you can get more VCOs from the same source.
Same problem again. The buffering effect is the real thing here.

And for a simple buffer replacement the A129/3 is much to  pricey ;)

Florian

-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
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Re: wish 4 a offset generator

2002-03-05 by stinchcombe_t

Hi all,
I'll chip in here - you can amplify CV signals with an A-132, which is
probably the main use I put mine to (you can even use it to get a
scaled, squared version of your CV out.)

I'll check the A-136 circuit tonight (I've drawn most of the modules
that I have out...):

> > Not so. This is one of the many possible uses for the A136
> > Distortion/Waveshaper, the other "Swiss Army Knife" module. 
> I fear, it is again DC-decoupled. This means again: not usable for
constant
> control voltages!
>  
> But this should answer Dieter, since I don't have the schematics of the
> A-136

[The views expressed above are entirely those of the writer and do not
represent the views, policy or understanding of any other person or
official body.]

Re: wish 4 a offset generator

2002-03-06 by stinchcombe_t

> I'll chip in here - you can amplify CV signals with an A-132, which is

Oops!. The above of course is complete rubbish ? you cannot amplify
with an A-132! Basically it?ll 
give a gain of 1 or less. (Must stop trying to do things from memory ?
I posted this quickly before I left 
work, and as I drove home realized it was completely wrong ? bad boy!
I don?t know what I was 
thinking of ? multiplication of CVs maybe, which is certainly what I
have used it for!)

There is a coupling capacitor in the A-136, but it is shorted by a
jumper (?JP2?, middle of top edge of 
the board), so it is DC coupled, and can amplify DC levels. However I
found the 136 really hard to 
understand until I got a scope: without one it?s virtually impossible.
The first op amp in the circuit 
amplifies the incoming signal by about 4.3 times, so anything larger
than about 2V immediately causes 
the op amp output to saturate just below the voltage supply rails (+/-
12V). For any AC signal this may 
be seen as clipping in the final signal output from the module
(depending on all the other settings?). 
Controlling the 136?s affect on a DC signal must take a lot of patience!

Tim

[The views expressed above are entirely those of the writer and do not
represent the views, policy or 
understanding of any other person or official body.]

Re: [Doepfer_a100] wish 4 a offset generator

2002-03-06 by Florian Anwander

Hi bakis 

> when you say "cv-signal amplification"you mean a cv
> signal(say an lfo triangle wave) from,for
> example,-2.5volts to +2.5volts,to make it -5volts to
> +5volts???
Yes, this also. But a LFO is in principle also AC. I mean constant
voltages.

I want as input the keyboard CV with constant 2 Volts. With an
amplification 1:2 the output result should be 4 Volts. If I jump up one
octave I would have as input 3 Volts. The output should be then 6 Volts.

In the opposite a decrease of the voltage should be possible with the
A-130/131/132Input Keyboard-CV 2 Volts; adjust the gain button to the
middle, now the output should be only 1 Volt. Now I press a key one octave
lower. The Input voltage goes to 1Volt, the output voltage should go down
to 0,5 Volt

I don't know until now no single Doepfer module which is able to control
constant voltages. Some one with insight to the schematics might correct me
(I don't have them here at work).

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

Re: [Doepfer_a100] Re: wish 4 a offset generator

2002-03-06 by Florian Anwander

Hi Joe

> voltages from the CV source module, and also with pitch CV from the
> A190. It works perfectly. 
Thats a good news.

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
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Re: [Doepfer_a100] Re: wish 4 a offset generator

2002-03-06 by bakis Sirros

thank you very much for the info!!!,joe
bakis.



--- buechlerjoe <buechlerjoe@toadmail.com> wrote:
> Hi Bakis
> 
> The A136 is one of two modules in the A100 lineup
> that work as a gain 
> stage, the other being the A119 External Input
> module. All of the 
> other modules, including the VCAs, only go up to a
> maximum of unity 
> gain. They're attenuators, not amplifiers.
> 
> The A136 is designed to handle both audio signals
> and control 
> voltages, so it does the CV amplification that
> Florian wants. If I 
> patch a CV to the A136's input jack, I can adjust
> the A 
> (amplification) knob to:
> 
> Gain = -1  - voltage inverter
> Zero gain  - total suppression of the signal
> Gain < 1   - attenuation
> Unity gain - signal pass-through
> Gain > 1   - amplification, as Florian wishes for
> 
> If I completely suppress the input signal (zero
> gain), I can then 
> set the +A (Positive signal amplification) knob to
> unity gain, so that 
> the CV passes through only if the voltage is above
> the adjustable 
> clipping level. When used with pitch CV, for
> example, the output only 
> begins to rise after a certain note on the keyboard
> is reached. If 
> this "tracking function" is used to modulate the
> filter, for example, 
> then VCF keyboard tracking is only applied to notes
> in the upper 
> registers, bass notes don't have VCF keyboard
> tracking applied to 
> them. This is the same type of thing that you can do
> on digital 
> synths, and even on more modern analog synths like
> the Matrix 1000.
> 
> The A136 could be used instead of the A119 to boost
> external audio 
> signals to the A100 operating level. It can also
> amplify internal A100 
> audio signals in order to "overdrive" a module to
> induce a traditional 
> distorted sound. (the A131 doesn't sound very good
> when overdriven, 
> but I understand that they're other A100 modules
> that sound very nice 
> when you overdrive them).
> 
> The A136 can also be used as a +/- CV source.
> 
> The rest, I think, can be found in the A136 User's
> Manual (I'll leave 
> the trigger modifier as an exercise, since I haven't
> actually done 
> that yet). I think the A136 could also be made to
> work as a 
> voltage-controlled on/off switch, similar to the
> A150, but I haven't 
> had a chance to try that either.
> 
> The A136 documentation contains some errors and
> ommissions that I 
> noted in an earlier thread.
> 
> Joe
> 
> --- In Doepfer_a100@y..., bakis Sirros
> <synth_freak_2000@y...> wrote:
> > hi joe,
> > please,can you explain further???
> > bakis.
> > 
> > 
> > 
> > --- buechlerjoe <buechlerjoe@t...> wrote:
> > > > So this is what I think: a possibility to
> amplify
> > > a CV-Signal is 
> > > really
> > > > missing in the A-100.
> > > 
> > > Not so. This is one of the many possible uses
> for
> > > the A136 
> > > Distortion/Waveshaper, the other "Swiss Army
> Knife"
> > > module. It can be 
> > > used as a simple attenuator, gain stage,
> overdrive
> > > preamp, voltage 
> > > inverter, external signal booster, trigger
> modifier,
> > > and a tracking 
> > > function generator. Oh, yeah, it also does
> > > distortion, and can create 
> > > radical waveshapes from an LFO signal.
> > > 
> > > Joe
> > > 
> > > 
> > 
> > 
> > =====
> > synthfreak(parallel worlds)
> > athens-greece
> > [Doepfer_a100] group owner-moderator
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Yahoo! Sports - sign up for Fantasy Baseball
> > http://sports.yahoo.com
> 
> 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

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Oscilloscope

2002-03-06 by Andreas Lindholm

Looking at the pics of the homepage and seeing the expected huge and semi
huge systems I also noticed a beutiful picture of a triangle wave in an
oscilloscope. Anybody have ideas about what oscilloscopes to buy for a
modular person that wants to see his sounds? Good prices and essentials
features, what are they?

/Andreas

Re: [Doepfer_a100] Oscilloscope

2002-03-07 by Florian Anwander

Hi Andreas 

> oscilloscope. Anybody have ideas about what oscilloscopes to buy for a
> modular person that wants to see his sounds? Good prices and essentials
> features, what are they?
The most software oszilloscopes are good enough for Audio displaying, and
they are much less expensive than a hardware system.

To my opinion an osc should have two channels. The most important feature
is a per channel individually selectable triggering level and logic.

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

Re: Oscilloscope

2002-03-07 by stinchcombe_t

> Looking at the pics of the homepage and seeing the expected huge and
semi
> huge systems I also noticed a beutiful picture of a triangle wave in an
> oscilloscope. Anybody have ideas about what oscilloscopes to buy for a
> modular person that wants to see his sounds? Good prices and essentials
> features, what are they?

Got mine from www.telfordelectronics.co.uk, they have loads of
second-hand stuff, and can ship internationally. Mine is a Tektronix
2205, dual beam analogue, 20MHz, cost around 150 pounds sterling,
which is about a third of the cheapest new one I could find. Does just
about all that I could want it to!

Tim

[The views expressed above are entirely those of the writer and do not
represent the views, policy or understanding of any other person or
official body.]

Re: wish 4 a offset generator

2002-03-07 by buechlerjoe

> However I
> found the 136 really hard to 
> understand until I got a scope: without one it?s virtually 
impossible.

It took me a day or two, but I was able to get a good understanding of 
the A136 by patching it to a VCO and listening to the results, and 
also by patching it to an A170 slew limiter and watching the -/+ LEDs.

There's no doubt that a sillyscope would be very useful, though. I'm 
watching that thread carefully, because I haven't found a good, 
inexpensive one that I like yet.

> The first op amp in the circuit 
> amplifies the incoming signal by about 4.3 times, so anything larger
> than about 2V immediately causes 
> the op amp output to saturate just below the voltage supply rails 
(+/-
> 12V). 

I mentioned this hard clipping of DC voltages back in the "Module 
Quirks" thread. I think the fact that its not mentioned in the A136 
User's Manual is a very serious ommission. In addition, the 
description of how the amplification pot operates is COMPLETELY 
BACKWARDS, and the description of the +A and -A pots is erroneous as 
well. 

I think that it would have been much easier for me to get an 
understanding of the A136 if the User's Manual wasn't so poor. This is 
definitely a case where Doepfer owes us a correction, and since the 
problem can be fixed by updating the online documentation, there's 
really no excuse.

> Controlling the 136?s affect on a DC signal must take a lot of 
patience!

There's no doubt that the A136 isn't for the faint-of-heart, but after 
using it for a while, and noting the approximate knob positions of 
various critical values, I don't find it anywhere near as laborious as 
it was at first.

Joe

Re: wish 4 a offset generator

2002-03-07 by stinchcombe_t

Hi Joe

> It took me a day or two, but I was able to get a good understanding of 
> the A136 by patching it to a VCO and listening to the results, and 
> also by patching it to an A170 slew limiter and watching the -/+ LEDs.

You must have more patience than me! I made up a little module with a
centre-zero meter in it, and tried to follow what was happening by
watching the needle swing back and forth, but soon convinced myself
that I wasn't going to get the full story that way. Even after I got
the scope and could *see* what was happening, I couldn't equate what I
saw to the manual. Then I drew out the circuit (the first one I tried
in fact) and finally sussed it!

> There's no doubt that a sillyscope would be very useful, though. I'm 
> watching that thread carefully, because I haven't found a good, 
> inexpensive one that I like yet.

As I mentioned in that thread, I picked up a second-hand one - my
understanding and enjoyment of my A-100 then increased about tenfold!
I'm impressed that so many people manage without one, I know I
couldn't, but then I'm not musical, so don't have that to fall back on...

> I mentioned this hard clipping of DC voltages back in the "Module 
> Quirks" thread. I think the fact that its not mentioned in the A136 
> User's Manual is a very serious ommission. In addition, the 
> description of how the amplification pot operates is COMPLETELY 
> BACKWARDS, and the description of the +A and -A pots is erroneous as 
> well. 
> 
> I think that it would have been much easier for me to get an 
> understanding of the A136 if the User's Manual wasn't so poor. This is 
> definitely a case where Doepfer owes us a correction, and since the 
> problem can be fixed by updating the online documentation, there's 
> really no excuse.

I quite agree! When I discovered the 'backwards' problem more things
started making sense. I emailed a fairly long list of
mistakes/corrections to Dieter some while back - let's just hope they
get round to correcting some of them. I'll check out the 'Quirks'
thread when I get the chance - sounds useful!

Tim

[The views expressed above are entirely those of the writer and do not
represent the views, policy or understanding of any other person or
official body.]

documentation errors? Re: wish 4 a offset generator

2002-03-07 by synchro1

--- In Doepfer_a100@y..., "stinchcombe_t" <tstinchcombe@q...> wrote:
<snip> When I discovered the 'backwards' problem more things
> started making sense. I emailed a fairly long list of
> mistakes/corrections to Dieter some while back - let's just hope 
they get round to correcting some of them. <snip>

Would you be willing to share this long list with the group?  I know 
of some of them but have recently begun exploring the individual 
modules in greater depth and would like to know what I have 
missed/overlooked/misunderstood.  Thanks.

Re: [Doepfer_a100] Re: Oscilloscope

2002-03-07 by Andreas Lindholm

Is 20mhz sufficient for audio use and are there any other values that one
should look out for to get decent curves of you audio?

/Andreas


----- Original Message -----
Show quoted textHide quoted text
From: "stinchcombe_t" <tstinchcombe@qinetiq.com>
To: <Doepfer_a100@yahoogroups.com>
Sent: Thursday, March 07, 2002 2:31 PM
Subject: [Doepfer_a100] Re: Oscilloscope


> > Looking at the pics of the homepage and seeing the expected huge and
> semi
> > huge systems I also noticed a beutiful picture of a triangle wave in an
> > oscilloscope. Anybody have ideas about what oscilloscopes to buy for a
> > modular person that wants to see his sounds? Good prices and essentials
> > features, what are they?
>
> Got mine from www.telfordelectronics.co.uk, they have loads of
> second-hand stuff, and can ship internationally. Mine is a Tektronix
> 2205, dual beam analogue, 20MHz, cost around 150 pounds sterling,
> which is about a third of the cheapest new one I could find. Does just
> about all that I could want it to!
>
> Tim
>
> [The views expressed above are entirely those of the writer and do not
> represent the views, policy or understanding of any other person or
> official body.]
>
>
>
> To unsubscribe from this group, send an email to:
> doepfer_a100-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Re: [Doepfer_a100] documentation errors? Re: wish 4 a offset generator

2002-03-08 by bakis Sirros

i agree!!! please send this list to the group...
bakis.



--- synchro1 <synchro1@ix.netcom.com> wrote:
> --- In Doepfer_a100@y..., "stinchcombe_t"
> <tstinchcombe@q...> wrote:
> <snip> When I discovered the 'backwards' problem
> more things
> > started making sense. I emailed a fairly long list
> of
> > mistakes/corrections to Dieter some while back -
> let's just hope 
> they get round to correcting some of them. <snip>
> 
> Would you be willing to share this long list with
> the group?  I know 
> of some of them but have recently begun exploring
> the individual 
> modules in greater depth and would like to know what
> I have 
> missed/overlooked/misunderstood.  Thanks.
> 
> 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

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documentation errors? Re: wish 4 a offset generator

2002-03-08 by stinchcombe_t

> i agree!!! please send this list to the group...
> bakis.

> > Would you be willing to share this long list with
> > the group?  I know 


Certainly I shall - I'll dig my list out over the weekend, so "watch
this space"!

Tim

[The views expressed above are entirely those of the writer and do not
represent the views, policy or understanding of any other person or
official body.]

Re: Oscilloscope

2002-03-08 by stinchcombe_t

--- In Doepfer_a100@y..., "Andreas Lindholm" <andreas.k.lindholm@t...>
wrote:
> Is 20mhz sufficient for audio use and are there any other values
that one
> should look out for to get decent curves of you audio?


My experience since I've had the scope (admittedly only about 4
months) is that 20MHz seems ample for audio - the only time I've had
it anywhere near its limit is when I've been looking at rise times on
pulses etc., and even then I didn't 'run out of steam'. The only thing
which seems to be essential is to make sure that you can use both
channels with either AC *or* DC coupling - the AC coupling capacitors
on my scope mean that low frequency square waves look nothing of the 
sort: to see the true shape you need the DC coupling.

Features I have, most of which I suspect are standard on a dual beam
scope (I'm not an expert on such things!), and which I've used a lot:

- can trigger off either channel, or can align the trigger points
('vertical mode') - useful sometimes to prevent one or other signals
jittering
- can trigger from an external signal
- can display ch1 versus ch2 in x <-> y fashion, useful for looking at
phase relationships
- can select either ch1, ch2 or both
- can add ch2 to ch1, and can invert ch2, so adding gives ch1-ch2
(only used this very occasionally)
- can either sweep ch1 then ch2 alternatley ('ALT'), or it will switch
very quickly between both ('CHOP') - removes flicker at low frequencies.

These features seam to cover my needs, I've not found myself wanting
anything else! Maybe others out there might like to add to this?

Tim

[The views expressed above are entirely those of the writer and do not
represent the views, policy or understanding of any other person or
official body.]

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