A Teensy 3.6 is used to run the show, acting as a USB-MIDI interface so the toy can be controlled by music software like Abelton. It’s connected to the toy’s buttons through a multiplexer.

This means that using this firmware, music software such as Max, Ableton, Reaktor etc can read and write MIDI directly to/from the Arduino. Currently the project is for direct USB-MIDI ...

MIDI is, in a word, a godsend. This unassuming data-transfer standard is the magic sauce that enables drastically different music technologies, developed decades apart, to tell each other what to ...