Physical touch is something that’s been sorely missing as music has become more digital. You’re not going to see a producer going all Pete Townshend on his $10,000 dollar studio equipment. But a weird and wonderful acoustic research project by Felix Flair turns any hard surface into a tactical musical instrument, bringing back some digital-physical contact. The installation, called Contact, uses some fancy-pants tech like contact microphones, passive sonar, and waveform analysis to recognize precisely where and with what part of the hand a surface has been hit. The beating is then digitally and head-noddingly turned into music. Wrist and fingernail hits…