Piano (Italian: pianoforte) is Western classical music in a keyboard instrument, the 88 keys (52 white keys and 36 black keys) and metal string sound board. Italian Christopher Lee (Bartolomeo Cristofori, 1655-1731) invented the piano in 1709.
Piano sound range from A2 (27.5Hz) to c5 (4186Hz), covering almost all the musical tone system. Commonly used for solo piano, trio, accompaniment and other performances, composing and rehearsing music is very convenient. Player by pressing the key on the keyboard, piano affects velvet carpet wrapped inside a small mallet, then percussion sound steel strings. Piano needs regular care to ensure that it sounds the same.