Dan Tepfer: NPR Music Tiny Desk Concert

Dan Tepfer has transformed the acoustic piano entirely with his new project, Natural Machines. Watch the keys and you’ll see this Disklavier — a player piano — plucking notes on its own. But it’s not a prerecorded script. Tepfer plays a note, and a computer program he authored reads those notes and tells the piano what to play in response. Tepfer can load different algorithms into the program that determine the pattern of playback, like one that returns the same note, only an octave higher. Another will play the inverted note based on the center of the piano keys. These rules create interesting restrictions that Tepfer says make room for thoughtful improvisation. In his words, he’s not writing these songs, so much as writing the way they work. To better communicate what’s happening between him and the piano, Tepfer converted these audio-impulse data into visualizations on the screen behind him, displaying in real time the notes he plays followed by the piano’s feedback.