Booniers drum machine got me thinking about drums again so tonight I made this.
It's 3 techno drums that are quite efficient. The kick and snare contain no oscillators but use a wrapped line segment. Total DSP count - 4 multiplies and a cos. This trick is extended in the snare with a feedback around a second function which results in a chaotic band of noise around the center frequency. Becuase we use [vline~] and always start on the same phase they sound pretty tight.