Cgs synth

1) Use a different VCO output. The square wave likes the PWM input to be
connected.

2) Sweep the tune knob, and if you still don't hear anything , try adjusting
the SPAN and ZERO trimmers. This VCO can quite happily work well above the
hearing range if these are wrong.

Ken

>Hello everyone,
>
>I've build a small system, only the bare minimum to make music, so far.
>
>I have the following modules built:
>Oakley Basic VCA
>Music From Outer Space Lowpass Filter
>Music From Outer Space Envelope Generator
>CGS VCO
>
>I hooked everything up today, but there's no noise coming out. This
>is how I've it patched:
>VCO -> Filter -> VCA
>and
>EG -> VCA
>
>I'm thinking there's a problem with the VCO. I've only wired three
>things: 1V/Oct input, tune knob, and square wave output. I tried
>hooking this straight into my keyboard amp, but did not get any sound.
>
>Also, I have no idea if the EG or Filter are working. Is there anyway
>to test them without a VCO?
>
>The VCA seems to be working. I connected my guitar to it, and the
>gain knob DID change the volume, so that's good.
>
>Where should I start troubleshooting?
>
>Also, when I was first starting up the system with the VCO in place, I
>was testing to see if it was getting the correct voltages from the
>power supply. It was, but, when I was probing it with my multimeter,
>I accidentally touched the bracket that the PCB is connected to. This
>created a small spark... Could I have shorted the circuit, making it
>unusable?
>
>Any help would be wonderful. This is very discouraging.
>
>Thanks,
>Cole
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
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>

_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>