That’s it on the left, next to a standard MIDI cable plug. The whole thing is so small it fits inside a MIDI plug and can run off the power supplied by the MIDI output, driving a small pizeo buzzer.

On the host PC side, he ran loopbe30 to create a virtual MIDI cable to Traktor, his DJ software. We love a build that looks just as good on the inside as on the outside, and Tannin doesn’t ...