[sdiy] Weird Vocoder project

[JH.]

Yes, that method of the Paia Vocoder is just brilliant.
Not so unexpensive now anymore, though.
Maybe try NE572.

JH.


----- Original Message ----- 
From: "Paul Perry" <pfperry at melbpc.org.au>
To: <Synth-diy at dropmix.xs4all.nl>
Sent: Monday, May 28, 2007 4:24 PM
Subject: RE: [sdiy] Weird Vocoder project



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 

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