MIDI controller keyboards are great because they let you ... MIDI instrument housing a Raspberry Pi. Using a Korg nanoKEY2 USB MIDI controller as base for the device, [Geordie] took it apart ...

[Harry Axten] turned the diminutive Korg Monotron into a playable ... A two-octave full-sized keyboard pulled from a scrapped MIDI controller or a MIDI connector at the back.