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Matrix Mixer PCB

Matrix Mixer PCB

2007-11-27 by Andrew

I'm working on a normalled/modular suitcase synth and just realized
that a Matrix Mixer would be perfect way to have most of the modulation
paths all together. But it's discontinued?

Anybody have an extra they'd part with?

Also, are the correct pots available at mouser or somewhere?

Drew

Re: Matrix Mixer PCB

2007-11-27 by sasami@hotkey.net.au

There will be a new version of the matrix mixer coming out, this time using
standard 16mm pots.

Ken
Show quoted textHide quoted text
>I'm working on a normalled/modular suitcase synth and just realized
>that a Matrix Mixer would be perfect way to have most of the modulation
>paths all together. But it's discontinued?
>
>Anybody have an extra they'd part with?
>
>Also, are the correct pots available at mouser or somewhere?
>
>Drew
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: Matrix Mixer PCB

2007-11-28 by Andrew

(wringing hands) Excellent!

My thoughts are to use a matrix mixer as the heart of a semi-
normalled synth. Have the inputs normalled to:
VCO1saw | VCO2tri | EG1 | EG2 | LFO

and have the outputs normalled to:
VCO1freq | VCO2freq | VCFfreq | VCFres | VCAgain

A bit like the 2500 matrix and the VCS pinfield ideas, but with the
knobs in there. Any comments or suggestions on that idea are
welcomed :)

Drew
Show quoted textHide quoted text
--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> There will be a new version of the matrix mixer coming out, this
time using
> standard 16mm pots.
>
> Ken
>
> >I'm working on a normalled/modular suitcase synth and just
realized
> >that a Matrix Mixer would be perfect way to have most of the
modulation
> >paths all together. But it's discontinued?
> >
> >Anybody have an extra they'd part with?
> >
> >Also, are the correct pots available at mouser or somewhere?
> >
> >Drew
> >
> >
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
>
______________________________________________________________________
_
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>
>

Re: Matrix Mixer PCB

2007-11-28 by John Mahoney

I've recently been thinking along similar lines.
--
john


At 12:17 PM 11/28/2007, Andrew wrote:
Show quoted textHide quoted text
>(wringing hands) Excellent!
>
>My thoughts are to use a matrix mixer as the heart of a semi-
>normalled synth. Have the inputs normalled to:
>VCO1saw | VCO2tri | EG1 | EG2 | LFO
>
>and have the outputs normalled to:
>VCO1freq | VCO2freq | VCFfreq | VCFres | VCAgain
>
>A bit like the 2500 matrix and the VCS pinfield ideas, but with the
>knobs in there. Any comments or suggestions on that idea are
>welcomed :)
>
>Drew


--
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Re: Matrix Mixer PCB

2007-11-28 by Richard Brewster

That is a very interesting idea! This raises a number of questions.
One is how you will wire in the normalized signals. The dot com
approach uses small connectors. I'd recommend that here, too, so that
you can easily disconnect it all, and you can change what's normalized.

Having only five inputs and five outputs is a limitation. I suggest
thinking about which signals need distributing, i.e. being sent to
multiple inputs. And whether you would prefer to distribute mainly
signals or controls. You might find it more useful to have all the
inputs be controls or signals, and then make the outputs suited. In
your example, how often would you patch a VCO saw into the VCF resonance
control? Not that it wouldn't be useful at all, but maybe "normal"
connections should be made for the "normal" types of patch. Putting my
point another way, you don't have the VCF or VCA inputs on your matrix
as destinations for the VCO outputs.

For a signal matrix you might have inputs: VCO1 saw, VCO2 saw, VCO2
tri, VCF out, VCA out; output of the matrix to VCF in, VCA in, VCO1
linear FM in, Ring Mod in 1, Ring Mod In 2.

For a control matrix the inputs: EG1, EG2, LFO1 Tri, LFO2 Tri, LFO 2
SQ; outputs to: VCO1 FM, VCO 2 FM, VCF Freq, VCF Res, VCA gain.

It seems to me you would get more out of a control matrix because we
like to distribute and mix control voltages, and because the modules in
and out are a disjoint set.

You get the idea.

Richard Brewster

Andrew wrote:
Show quoted textHide quoted text
> (wringing hands) Excellent!
>
> My thoughts are to use a matrix mixer as the heart of a semi-
> normalled synth. Have the inputs normalled to:
> VCO1saw | VCO2tri | EG1 | EG2 | LFO
>
> and have the outputs normalled to:
> VCO1freq | VCO2freq | VCFfreq | VCFres | VCAgain
>
> A bit like the 2500 matrix and the VCS pinfield ideas, but with the
> knobs in there. Any comments or suggestions on that idea are
> welcomed :)
>
> Drew
>
> --- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
>> There will be a new version of the matrix mixer coming out, this
>>
> time using
>
>> standard 16mm pots.
>>
>> Ken
>>

Re: Matrix Mixer PCB

2007-12-03 by bill bigrig

Howdy,

Why not make a matrix of SPST switches?
Rig

Show quoted textHide quoted text

--- Andrew <dumpstatic@...> wrote:

> (wringing hands) Excellent!
>
> My thoughts are to use a matrix mixer as the heart
> of a semi-
> normalled synth. Have the inputs normalled to:
> VCO1saw | VCO2tri | EG1 | EG2 | LFO
>
> and have the outputs normalled to:
> VCO1freq | VCO2freq | VCFfreq | VCFres | VCAgain
>
> A bit like the 2500 matrix and the VCS pinfield
> ideas, but with the
> knobs in there. Any comments or suggestions on that
> idea are
> welcomed :)
>
> Drew
>
> --- In cgs_synth@yahoogroups.com, sasami@... wrote:
> >
> > There will be a new version of the matrix mixer
> coming out, this
> time using
> > standard 16mm pots.
> >
> > Ken
> >
> > >I'm working on a normalled/modular suitcase synth
> and just
> realized
> > >that a Matrix Mixer would be perfect way to have
> most of the
> modulation
> > >paths all together. But it's discontinued?
> > >
> > >Anybody have an extra they'd part with?
> > >
> > >Also, are the correct pots available at mouser or
> somewhere?
> > >
> > >Drew
> > >
> > >
> > >
> > >The CGS Modular Synth home page:
> http://www.cgs.synth.net/
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
>
______________________________________________________________________
> _
> > Ken Stone sasami@...
> > Modular Synth PCBs for sale
> <http://www.cgs.synth.net/>
> > Australian Miniature Horses & Ponies
> <http://www.blaze.net.au/~sasami/>
> >
>
>
>



____________________________________________________________________________________
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Re: Matrix Mixer PCB

2007-12-04 by ilanode

You'll most likely miss attentuators. (Even the EMS patch matrix has
attentuators since the pins are of different resistance AFAIK.) Rgds, Ingo
Show quoted textHide quoted text
--- In cgs_synth@yahoogroups.com, bill bigrig <billbigrig@...> wrote:
>
> Howdy,
>
> Why not make a matrix of SPST switches?
> Rig
>
>
> --- Andrew <dumpstatic@...> wrote:
>
> > (wringing hands) Excellent!
> >
> > My thoughts are to use a matrix mixer as the heart
> > of a semi-
> > normalled synth. Have the inputs normalled to:
> > VCO1saw | VCO2tri | EG1 | EG2 | LFO
> >
> > and have the outputs normalled to:
> > VCO1freq | VCO2freq | VCFfreq | VCFres | VCAgain
> >
> > A bit like the 2500 matrix and the VCS pinfield
> > ideas, but with the
> > knobs in there. Any comments or suggestions on that
> > idea are
> > welcomed :)
> >
> > Drew
> >
> > --- In cgs_synth@yahoogroups.com, sasami@ wrote:
> > >
> > > There will be a new version of the matrix mixer
> > coming out, this
> > time using
> > > standard 16mm pots.
> > >
> > > Ken
> > >
> > > >I'm working on a normalled/modular suitcase synth
> > and just
> > realized
> > > >that a Matrix Mixer would be perfect way to have
> > most of the
> > modulation
> > > >paths all together. But it's discontinued?
> > > >
> > > >Anybody have an extra they'd part with?
> > > >
> > > >Also, are the correct pots available at mouser or
> > somewhere?
> > > >
> > > >Drew
> > > >
> > > >
> > > >
> > > >The CGS Modular Synth home page:
> > http://www.cgs.synth.net/
> > > >
> > > >Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > >
> >
> ______________________________________________________________________
> > _
> > > Ken Stone sasami@
> > > Modular Synth PCBs for sale
> > <http://www.cgs.synth.net/>
> > > Australian Miniature Horses & Ponies
> > <http://www.blaze.net.au/~sasami/>
> > >
> >
> >
> >
>
>
>
>
____________________________________________________________________________________
> Be a better friend, newshound, and
> know-it-all with Yahoo! Mobile. Try it now.
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
>

ASR

2007-12-04 by Anthony Rolando

Hey, I picked up a bunch of modules from a fellow (some commercial, some diy) one of which is the CGS ASR (cgs34).

It is not working. It basically pulls the power rails down (have not checked which yet) as soon as it is turned on.

Here is where it gets funny. All the IC are socketed. So I take all of them out. Still whacks the power rails. Long story short, I have removed all IC, all panel connections and all 3 of the polarized caps... still whacked. I searched for solder bridges and found one... but alas, still whacked.

Then I got to thinking, perhaps this is an earlier revision with some sort of brd problem... is this possible? It looks as though somebody attempted to cut a trace, but there is still continity. Are there any older revisions of this board needing a trace cut or something?

Thanx,

Tony

Tony
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Re: ASR

2007-12-04 by Anthony Rolando

Nevermind, I found a second solder bridge. The board powers up without whacking things. Should be clear sailing from here on out.

Thanx,

Tony


----------------------------------------
Show quoted textHide quoted text
> To: cgs_synth@yahoogroups.com
> From: goldenechos@...
> Date: Tue, 4 Dec 2007 18:00:12 -0500
> Subject: [cgs_synth] ASR
>
>
> Hey, I picked up a bunch of modules from a fellow (some commercial, some diy) one of which is the CGS ASR (cgs34).
>
> It is not working. It basically pulls the power rails down (have not checked which yet) as soon as it is turned on.
>
> Here is where it gets funny. All the IC are socketed. So I take all of them out. Still whacks the power rails. Long story short, I have removed all IC, all panel connections and all 3 of the polarized caps... still whacked. I searched for solder bridges and found one... but alas, still whacked.
>
> Then I got to thinking, perhaps this is an earlier revision with some sort of brd problem... is this possible? It looks as though somebody attempted to cut a trace, but there is still continity. Are there any older revisions of this board needing a trace cut or something?
>
> Thanx,
>
> Tony
>
> Tony
> _________________________________________________________________
> You keep typing, we keep giving. Download Messenger and join the i’m Initiative now.
> http://im.live.com/messenger/im/home/?source=TAGLM
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
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>
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>
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>
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>
> Your use of Yahoo! Groups is subject to:
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>
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Re: ASR

2007-12-04 by sasami@hotkey.net.au

Good. That saves me telling you that there have been no circuit changes on
the board :) The later variant merely has lightly better spacing of parts
to ease the fitting of the S&H caps.

Ken
Show quoted textHide quoted text
>Nevermind, I found a second solder bridge. The board powers up without
whacking things. Should be clear sailing from here on out.
>
>Thanx,
>
>Tony
>
>
>----------------------------------------
>> To: cgs_synth@yahoogroups.com
>> From: goldenechos@...
>> Date: Tue, 4 Dec 2007 18:00:12 -0500
>> Subject: [cgs_synth] ASR
>>
>>
>> Hey, I picked up a bunch of modules from a fellow (some commercial, some
diy) one of which is the CGS ASR (cgs34).
>>
>> It is not working. It basically pulls the power rails down (have not
checked which yet) as soon as it is turned on.
>>
>> Here is where it gets funny. All the IC are socketed. So I take all of
them out. Still whacks the power rails. Long story short, I have removed all
IC, all panel connections and all 3 of the polarized caps... still whacked.
I searched for solder bridges and found one... but alas, still whacked.
>>
>> Then I got to thinking, perhaps this is an earlier revision with some
sort of brd problem... is this possible? It looks as though somebody
attempted to cut a trace, but there is still continity. Are there any older
revisions of this board needing a trace cut or something?
>>
>> Thanx,
>>
>> Tony
>>
>> Tony
>> _________________________________________________________________
>> You keep typing, we keep giving. Download Messenger and join the i’m
Initiative now.
>> http://im.live.com/messenger/im/home/?source=TAGLM
>>
>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>
>> Yahoo! Groups Links
>>
>> To visit your group on the web, go to:
>> http://groups.yahoo.com/group/cgs_synth/
>>
>> Your email settings:
>> Individual Email | Traditional
>>
>> To change settings online go to:
>> http://groups.yahoo.com/group/cgs_synth/join
>> (Yahoo! ID required)
>>
>> To change settings via email:
>> mailto:cgs_synth-digest@yahoogroups.com
>> mailto:cgs_synth-fullfeatured@yahoogroups.com
>>
>> To unsubscribe from this group, send an email to:
>> cgs_synth-unsubscribe@yahoogroups.com
>>
>> Your use of Yahoo! Groups is subject to:
>> http://docs.yahoo.com/info/terms/
>>
>_________________________________________________________________
>Your smile counts. The more smiles you share, the more we donate. Join in.
>www.windowslive.com/smile?ocid=TXT_TAGLM_Wave2_oprsmilewlhmtagline
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: ASR

2007-12-04 by Richard Brewster

It's always a good idea to check the resistance between the power pins
and ground before plugging in power for the first time. Most modules
will show 10K to 100K between +V and ground and between -V and ground.
You will see the resistance increase gradually, as capacitors charge up.

Richard Brewster

Anthony Rolando wrote:
Show quoted textHide quoted text
> Nevermind, I found a second solder bridge. The board powers up without whacking things. Should be clear sailing from here on out.
>
> Thanx,
>
> Tony
>
>
> ----------------------------------------
>
>> To: cgs_synth@yahoogroups.com
>> From: goldenechos@...
>> Date: Tue, 4 Dec 2007 18:00:12 -0500
>> Subject: [cgs_synth] ASR
>>
>>
>> Hey, I picked up a bunch of modules from a fellow (some commercial, some diy) one of which is the CGS ASR (cgs34).
>>
>> It is not working. It basically pulls the power rails down (have not checked which yet) as soon as it is turned on.
>>
>> Here is where it gets funny. All the IC are socketed. So I take all of them out. Still whacks the power rails. Long story short, I have removed all IC, all panel connections and all 3 of the polarized caps... still whacked. I searched for solder bridges and found one... but alas, still whacked.
>>
>> Then I got to thinking, perhaps this is an earlier revision with some sort of brd problem... is this possible? It looks as though somebody attempted to cut a trace, but there is still continity. Are there any older revisions of this board needing a trace cut or something?
>>
>> Thanx,
>>
>> Tony
>>
>> Tony
>>

Re: Matrix Mixer PCB

2007-12-05 by Andre Majorel

On 2007-12-03 16:34 -0800, bill bigrig wrote:
Show quoted textHide quoted text
> Why not make a matrix of SPST switches?

From what I've seen, switches are no cheaper than pots. Rather the
opposite, actually.

--
André Majorel <URL:http://www.teaser.fr/~amajorel/>
Do not use this account for regular correspondence.
See the URL above for contact information.

Re: Matrix Mixer PCB

2007-12-08 by bill bigrig

Howdy,

Actually, I've got several boxes of mini and sub mini
in different configurations DPDT DPST MOMENTARY that I
bought in bulk for 50 or 75 cents each. They work
great on my circuit bending projects. Or, use 1/4" or
1/8" sockets. that way you could solder a resistor in
the plug just like the EMS stuff.
Rig

Show quoted textHide quoted text

--- Andre Majorel <aym-htnys@...> wrote:

> On 2007-12-03 16:34 -0800, bill bigrig wrote:
>
> > Why not make a matrix of SPST switches?
>
> From what I've seen, switches are no cheaper than
> pots. Rather the
> opposite, actually.
>
> --
> André Majorel <URL:http://www.teaser.fr/~amajorel/>
> Do not use this account for regular correspondence.
> See the URL above for contact information.
>



____________________________________________________________________________________
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