[sdiy] Weird Vocoder project

[Paul Perry]

I think the best really cheap VCA would be the hex vca from Polyphony
July/Aug 1979. 
But I can't see a schematic on the web.

The MS20 VCA is rather noisy & requires transistor selection.

Personally, I'd try using NE571s, because you get two VCAs and two envelope
followers per chip. If you can find NE571 or NE570 cheap, that is...

Paul perry Melbourne australia