When you’re using CV gear, you need multiple sources of 0-5V to control it all.
I used this simple schematic. Pots are acting as voltage dividers to send between 0 and 5 Volts.
And repeated it 4 times to fit on an half-sized breadboard:
I cut off the rail so that the pots can go straight into the front plate.
For this one I added a switch and 2 mini jacks so that I can input/output a voltage from the MIDI2CV controller instead of moving the pots: