Optical Tremolo.

This is 100roberthenry's

optical tremolo. Personally I think its great sounding, especially with the small amount of parts used. Here is what he says about it: "experimenting with tremolo's..mono and stereo ..dual tremolo's in one pedalfor panning left and right....optical..."

What gets me excited about this is the stereo applications that one could use it for. if one channel was in a feed back loop with a delay and other time based effects the tonal possibilities would be nearly uncountable.