[sdiy] SSM2164 base for Doepfer sdiy synth kit.

[Tom Wiltshire]

>>> Anything else unmissable I've forgotten?
>> 
>> Yes.  The "2164 Multiplying Modulator", my fancy variable-quadrant ring
>> modulator -- although, whether it is "unmissable" is debatable.

Oh, yes, definitely we should have a ring modulator/amplitude modulator in there.

>> 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)

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.

>> We should have a little contest to come up with as many 2164-based module
>> ideas as we can, and then I can write about them.
> 
> 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.

T.