We've seen an orchestra's worth of robotic musicians, but we've yet to see one that integrates this perfectly into a piece without any human intervention. Shimon -- a robotic marimba player created by Georgia Tech's Guy Hoffman (formerly of MIT), Gil Weinberg (the director of the Georgia Tech Center for Music Technology) and Roberto Aimi of Alium Labs -- recently made its stage debut by sensing the music from a piano and reacting accordingly in order to provide complementary percussion. Unlike many alternatives, there's absolutely no delay here. Instead, it analyzes the classification of chords, estimates the human's tempo and attempts to extract features from the human's melodic phrases and styles. What you're left with a robot musician that goes beyond call-and-response and actually meshes with the Earthling's playing throughout. The full performance is posted after the break, and make sure to leave a donation as you exit through the doors on the left.