Each of the rows is coloured in black and white so that they can be differentiated, and xpercipio has programmed it so that each switch triggers a note. The first column is C, then C#. The two white columns next to each other are E and F.
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Writing on Reddit about their creation, xpercipio says: “This is a teensy powered midi board that uses cherry mx clear switches. They are tactile in feeling. And boy are they.
“The springs are stronger than the ones I am used to, and they make my experienced switches feel like linears, even though they are tactile also.
“120 buttons with unlimited polyphony. no velocity or aftertouch though. I don't utilize those much other than automation anyways."
They say that they are playing “just Maj7 arpeggios, then I press a bunch of keys to demonstrate the polyphony. Then its a Db 6/11 arpeggio.”
In the video, they are using the MIDI controller in conjunction with a piano, saying that they are playing 'the maverick' from native instruments - played with a randomized velocity range from 70-80.
Aneesa Ahmed is Mixmag's Digital Intern, follow her on Twitter