[sdiy] looking for diy vocoder options

[JH.]

The Okita Design uses NE571 to handel the envelope follower and VCA parts,
this helps to reduce parts count. Can someone comment on the sound
/performance of the ne571?
(I would like to change the design to 14 bands however, should be doable)

The Paia Vocoder also used compander chips.
That's a brilliant move, as you have two complete decent envelope followers 
and two complete decent VCAs in one DIP14 package.
The downside is, you're restricted to 1-pole filtering after the envelope 
follower, and you can't break the connection for slew control or freeze.
And the log domain filtering may cause a different response shape than a 
classic vocoder with linear envelope followers, multi-pole filtering, linear 
slew control, and linear VCA.

JH. (Thinking a *lot* about Vocoders again, lately.)

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