A player piano is a special kind of piano that can play music by itself. It has a mechanism that can move the keys and pedals without a person playing them. Full definition
In 1993, the artist scratched the surface of a huge rotating black disc while listening to music, following the rhythm with one hand and the melody with the other to create a record of his aesthetic response to music in Record Drawing (Conlan Nancarrow Studies for Player Piano Vol. (pacegallery.com)
A Yamaha digital grand player piano performed the artist's attempt to play the Portuguese folk song «Grândola, Vila Morena» from memory — the song that played on the radio to signal the beginning of the Portuguese revolution in 1974. (caseykaplangallery.com)
This is a classic piano rag tune first written by Scott Joplin and used on original player pianos. (businessinsider.com)