About piano:
ABOUT PIANO: The piano is an acoustic, stringed musical instrument invented in Italy by Bartolomeo Cristofori around the year 1700 (the exact year is uncertain), in which the strings are struck by hammers. It is played using a keyboard, which is a row of keys (small levers) that the performer presses down or strikes with the fingers and thumbs of both hands to cause the hammers to strike the strings. *A musical keyboard is the set of adjacent depressible leavers or keys on a musical instrument. * Keyboards typically contain keys for playing the twelve notes of the Western musical scale,with a combination of larger,longer keys and smaller,shorter keys that repeat at the interval of an octave.