[sdiy] AC coupling caps on MS20 clone

[David G. Dixon]

> Did you just look & listen to an applied waveform, or did you VC
> modulate it with a quick envelope or LFO?
> CV bleedthrough is what I'd suspect to be the main problem here.

CV bleedthrough with 2164 is pretty small, especially if the right bias
resistor is used on the mode pin.  I use 560k, which should (if I'm reading
the figure correctly) virtually eliminate CV bleedthrough.  This would be a
much bigger problem with an OTA-based circuit.

Also, how would AC coupling caps block CV bleedthrough from a quick envelope
or LFO?