People disagree about whether the piano is a percussion or a string instrument. You play it by hitting its 88 black and white keys with your fingers, which suggests it belongs in the percussion family. However, the keys lift hammers inside the piano that strike strings (indeed, the piano has more strings than any other string instrument), which produce its distinctive sound. Which family do you think it belongs to? Wherever it fits in, there's no disputing the fact that the piano has the largest range of any instrument in the orchestra. It is a tuned instrument, and you can play many notes at once using both your hands. Within the orchestra the piano usually supports the harmony, but it has another role as a solo instrument (an instrument that plays by itself), playing both melody and harmony.