> Changing the determining capacitors...
>
> Can't it be variable, some kind of "vari-capacitance"
> And put this under CV control as well!
> And a different CV for stage 1-6 and stage 7-12 of the A-101-3.
>
> .. I would buy that immediately.

One could probably make very much money with the design of a voltage
controlled capacitor VCC :-) This would revolutionize the whole electronics.
I know only such designs in the HF electronics (with capacitors in the pF
range, e.g. with varactor diodes). I don't know any VCC circuit with values
in the 10nF range.

Best wishes
Dieter Doepfer