Hey Richard, thanks for replying !
The funny thing is, just 5 minutes before I checked in here, I saw Scott's VCS design over at the MSP group...
The funny thing is, just 5 minutes before I checked in here, I saw Scott's VCS design over at the MSP group...
--- In cgs_synth@yahoogroups.com, Richard Brewster <pugix@...> wrote:
>
> I haven't built a CGS 75 yet. I am waiting to see what the Bridechamber
> MOTM format panel looks like first. And I'm waiting for the CGS-75 PCB
> boards to become available from Ken Stone again. But I can give some
> answers.
>
> The AC output is ground-centered - it has zero bias.
So it will indeed go from 0V to -2.5V before it starts Rising, and from -2.5V to 0V at the end of Fall ? That'll give for a rather different sound/waveshape than the other outputs...
>
> The Rise/Fall CV pots are reversible attenuators, with the center
> position being the minimal amount.
As I thought, yes. Very cool.
> Exponential CV affects both rise and fall equally in an exponential
> manner. If cycling, it works similar to a 1V/oct CV input on a VCO, but
> not accurate to 1V/oct.
So, the Exp.CV In is in fact the same as the Both CV In (when responses are switched to exponential), but always "full on". Right ?
>
> I designed a Front Panel Express panel for the CGS 75 Serge VCS. It's
> available in this directory on Yahoo Groups:
> <http://launch.groups.yahoo.com/group/ModularSynthPanels/files/Richard%20Brewster%20Designs/
>
I'll fire up WIndows on my Mac, and have a look. Thanks !
> On my panel design I put input and output jacks for the Processor, so
> that it can be patched in wherever you want it. I think the best option
> for hard-wiring it would be in front of the Both CV input.
Okay, that makes sense. I think I'll include the Processor too - it's too useful to leave it out.
thanks again !
_g
>
>
> Richard Brewster
> http://pugix.com
>
>
> Guy wrote:
> > Started doing the panel for the VCS, and wanted to be sure about some things. Sorry if this has been asked before.
> >
> >
> > - The output signals - is this correct :
> >
> > http://www.guyd2.com/stuff/VCS_signals.gif
> >
> > (not sure about the bias of AC Out)
> >
> >
> > - Are the Rise/Fall CV input pots wired for both negative & positive CV amount ?
> >
> > - As far as I understand, the Exp. CV In (1V/Oct) does not affect the rate of Rise/Fall, but merely 'transposes' the signal ?
> >
> > - The optional Processor section is simply a unity gain amp with either inverted or non-inverted output, right ? How can this be hard-wired to the VCS in- or outs for most effectiveness, ie. how can it be most useful when I don't bring it out to the frontpanel ?
> >
> >
> > thanks,
> > _g
> >
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > The CGS Modular Synth home page: http://www.cgs.synth.net/
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>
