[sdiy] Polymoog Polycom chip block diagram?

[Ingo Debus]

> Am 18.02.2022 um 06:20 schrieb Michael E Caloroso via Synth-diy <synth-diy at synth-diy.org>:
> 
> the VCF has zero resonance capability, zero modulation (no EG, no LFO, no key tracking, no velocity), and its cutoff is varied by fixed resistors per preset.  It is merely a "brightness" filter.

So, is it a VCF at all? If so, where does the control voltage come from?

Ingo
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