MOTM

Is there any simple circuit that could be made to permit voltage control
over any pot? My question probably doesn't make much sense, and with my
limited electrical knowledge, I probably won't explain it very well
either. What I was thinking of was  a circuit designed to simulate a
pot. A simple circuit with a CV in, a CV attenuator, and 3 wires to
replace the pot, 2 to provide a constant resistance and one to vary
according to CV. This would be a simple solution to those of us who want
voltage control over the freq. on their MOTM-420's or the wet/dry
control on a spring reverb. Maybe I'm out of my mind here, and this is
an impossibility, but it's worth throwing out. Let me know if it's
possible or if it would involve too much circuitry. -Nate