[sdiy] SSM2164 base for Doepfer sdiy synth kit.

[David G. Dixon]

> >> And, of course, a stereo mixer/panner (something the chip was actually
> >> intended to be used for by its inventors).
> 
> Handy for  waveform/oscillator mixing. Can we get filter pole mixing too?
> (Probably best with linearised VCAs)

Please explain.  I'm just an Unfrozen Caveman Synth-DIYer -- your big words
confuse and frighten me...

> What about an interpolating scanner, or voltage-controlled waveshapers? If
> the book's going to be a success, it needs a few unusual things too.

Absolutely!  Anything "VC" is fair game!

> > Equal Power VC Panning/Xfading, please.
> > Thank you. :-)
> 
> That's actually a pretty tricky one, because the exponential response of
> the SSM2164 VCAs is exactly the wrong way around for that application.
> I've done it in software, and I wouldn't particularly like to try it in
> hardware - although I know it can be done.

No, it's easy to do.  You just need to use my handy-dandy "reverse
exponential response" (another sidebar topic for the book, I guess).  It
requires an extra opamp, but it works a treat.