Cgs synth

I posted a couple of quick and dirty examples of my Bi-N-Tic module under:

http://web.pdx.edu/~rfahl/Audio/

bi_n_ticked_off.mp3 is a simple sequenced ditty, square wave of an
Electronotes Option 3 VCO into the BNT's audio input, another analog
sequencer driving one CV input of the BNT's VCO and a triangle LFO
driving another CV input.

bi_n_ticked_off2.mp3 starts with only the 4 divider outputs being fed
into the audio in, then the EN Opt. 3 VCO ditty is faded into the
other audio input. Only CV into the BNT VCO is the same tri LFO as above.

--- In cgs_synth@yahoogroups.com, "vtl5c3" <romeo.fahl@...> wrote:
>
> Thanks to the recent thread I decided to revisit my non-working
> Bi-N-Tic filter. I'd used a BF245A or B for the VCO FET. Not a good
> substitute - don't bother trying it. I found a PN4091 in my stash,
> soldered it in and the VCO started working right away.
>
> The next problem was the diode that goes to the BC547. I have the
> Rev.1.1 board and didn't know about the error on PCB until I happened
> to re-read the fine print on the CGS site this morning. Putting the
> diode in correctly and fixing a blown trace got the module working...
>
> One modification that I made is that I took four of the 4024 outputs
> and summed them into a CGS04 mixer, which I piggy-backed onto the main
> board. That output is then fed into the second audio input, adding
> some nice "prickly" pulses if I turn up the gain.
>
> It's quite an ornery beast. The patch I came up with this morning made
> me think of nails being thrown into a jet engine. I'll try and record
> a sample later on.
>