https://forum.percussa.com/
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https://hackaday.com/2008/05/23/audiocubes-by-percussa/
AudioCubes By Percussa | Hackaday
May 23, 2008 - [Peter Nyboer] has written an extensive post about his experience with AudioCubes from Percussa. Aside from their unique glowing exterior, these cubes are an...
hackaday