sequencer thingy. 555 switchable from monostable (so it can be clocked from my turntable sampler thing) or astable to clock itself. the momentary buttons pause and reset the sequence. The jack in the middle lets the sequence be reset by the outside world (drum kit) the row of switches at the bottom are a sort of custom clock, so when they are pushed down they send a pulse (out the jack on the right) to advance a second sequencer for slower musical changes.
