Antique Player Piano Rolls
The piano was among the last instruments to be automated. For one, the motion of a hammer striking a string is harder to animate than forcing an organ-pipe valve open and sending air through bellows. Secondly, the sound of a piano depends on both how hard you hit a key and how long you hold it. Strange and elaborate devices to play automated music have been built since ancient times. Cylinders or barrels with protruding pegs or pins were...