For just this problem, [little-scale] has built a MIDI-controllable DAC for generating control voltages. It’s a simple enough build – a Teensy 2 is used to speak USB MIDI to a laptop.
The build is a further step forward in simplicity from [little-scale]’s previous work, using a Teensy 2 with an offboard DAC to generate the output voltages. Here at Hackaday, we’ve always ...