The Arduino is used to send gate signals to the Monotron, and by varying the voltage levels it changes the pitch. In the second demo, the Nunchuk is used to more intuitively control the Monotron ...

Code for Arduino to control a Korg Monotron via MIDI - mpasserini/arduino_monotron ...

The Korg Monotron Duo is a small ribbon controller pocket synth I got as a stocking stuffer a couple years ago. It's pretty cool for what it is, but playing the tiny ribbon controller gets old pretty ...