Pianola

The Pianola was a trademark of the Aeolian Corporation (filed in 1898), referring to a its "Piano Player," a device that could be pushed up to the keyboard of any piano, and would play the keys of that pianos using rolls. It was a pneumatic machine, with pedal operated pump and mechanism. The trade name "Pianola" was adopted by the public and later used to refer to any player piano.

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These wooden "fingers" in the back of the instrument fit over the keys of the piano. The range was 65 notes, or a little over five octaves.

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Pressing each pedal in turn filled the bellows that operated the complex machinery inside.

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The holes in the player roll allowed outside air to close a valve, causing a small bellows to inflate and play the corresponding key.

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