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The piano is a kind of keyboard instrument in Western classical music, and has the reputation of "king of the instrument". It consists of 88 keys (52 white keys, 36 black keys) and a metal string soundboard. The Italian Bartoloo Christopher, 1655-1731) invented the piano in 1709.
The piano range ranges from A0 (27.5 Hz) to C8 (4186 Hz), and it covers almost all the tones in the tone system. It is the most extensive instrument in addition to the organ. Pianos are commonly used in solo, ensemble, accompaniment, etc. It is very convenient to compose and rehearse music. By pressing the keys on the keyboard, the player pulls the muslin in the piano and then taps the wire string to make a sound. The piano needs regular care to keep its tone unchanged.