This enables [Turi] to use [Ryo Ishigaki]’s pico_synth_ex synthesizer and introduce MIDI out via USB-C. The new engine does things that little keyboard could never have dreamed of originally ...

In fact, we would venture to guess that the hardest part of building your own version of [CrazyRobMiles]’s Pico Chord Keyboard would be teaching your fingers how to work together to chord ...

For hardware, he used the Raspberry Pi Pico with three series resistors, a VGA connection, and DC power. He also used a USB OTG micro-B to A adapter for connecting a USB keyboard and mouse.