There are already several robots constructed for the sole purpose of playing Guitar Hero and hitting every note using the game's guitar controller (we won't get into why these even exist in the first place), but this latest music game automaton is a different beast; it's built to dominate Rock Band for the iPhone.

Tinkerer Joe Bowers used ambient light sensors to detect the bright colored notes, which send data to an Arduino that tells a series of servos/synthetic fingers to tap the system's touchscreen. It's just a shame the squeaky fingers drown out whatever song happens to be playing.

With some trivial modifications, I'm sure this Rock Band robot could also work on Tap Revenge 3, another popular (and more fun) music game on the App Store.