Highly Liquid UMR2 Universal Midi Retrofit Board from TeeVee on Tindie
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Highly Liquid MIDI CPU - TH3RDWAVE.com
OpenDeck Is An Open Platform For Making Custom MIDI Controllers – Synthtopia
The MIDI CPU Project – 1. The Hardware | Music Electronics
Build your own MIDI controller with the Highly Liquid MIDI CPU board - gearnews.com