Tetrad is the dubstep and bass music project of L.A.-based musician, producer, songwriter and DJ Cheyne Bush. A lifelong musician, Cheyne learned jazz on sax and guitar in school, and punk and experimental music at home. Back in the day he started the street punk and ska band Issue 89 and went on to play with punk acts like Agent Orange and The Diffs. After a tenure with metalcore band MidMourn, and experiments in minimal techno, IDM, 4×4 and 2-step garage