phdinfunk wrote:
>
> > Onboard VCA that wasn't needed for usual task was
> > misused
> > to give sorta 3rd VC mixer input by adding it's out to the ext audio
> > in in the vcf.
>
> Could you explain this futher, I don't understand at all. Is the VCA
> used for the noise generator or what?
Yes. VC Mixer is nothing more than two VCAs with their outputs
summed into an opamp. I suppose they have only log CV inpits
(called Level CV here). Main VCA, which was intended to be used
as normal final VCA (like in a classic monosynth), wasn't needed
so it was fed with white noise and that to the second audio
input of vcf (first is fed with vc mixer's output).
Real polysynth would need 8 such chips, two inputs for each osc
of a voice, to vcf and to vca, and so 8 times for each voice.
Alas, poly800 was unfortunate mix of designs so it ended with
string machine configuration - all poly voices summed and then
routed to the single VCF.
--
marjan
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