Disklavier

Disklavier /ˈdɪskləvɪər/ is the brand name for a family of high-tech, reproducing pianos made by Yamaha Corporation. The first Disklavier was introduced in the United States in 1987.

The typical Disklavier is a real acoustic piano outfitted with electronic sensors for recording and electromechanical solenoids for playback. Sensors record the movements of the keys, hammers, and pedals during a performance, and the system saves the performance data as a Standard MIDI File (SMF). On playback, the solenoids move the keys and pedals and thus reproduce the original performance.