Slip on a pair of Mi.Mu gloves, and you can create complex compositions just by waving your hands. The offbeat instrument, which began in the mind of musician Imogen Heap nearly a decade ago, finally became available for any performer this year. Inertial measurement units—essentially a mashup of gyros and accelerometers—track movement, while sensors in the fingers detect minute gestures. Movements create sound loops, produce pitches, and even play audio clips during live performances, and Glover, its custom software, integrates with professional production apps like Ableton.