A player piano (also known as pianola or autopiano) is a self-playing piano, containing a pneumatic or electro-mechanical mechanism that operates the piano action via pre-programmed music perforated paper, or in rare instances, metallic rolls. The rise of the player piano grew with the rise of the mass-produced piano for the home in the late 19th and early 20th century. Sales peaked in 1924, as the improvement in phonograph recordings due to electrical recording methods developed in the mid-1920s. The advent of electrical amplification in home music reproduction via the wireless in the same period helped cause their eventual decline in popularity, and the stock market crash of 1929 virtually wiped out production.

Noun

player piano (plural player pianos)

1. (music) An acoustic piano which is automatically played (mechanically).

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