My favorite instrument

The piano Is a musical instrument classified as a keyboard instrument swinging strings by traditional classification system according to the Hornbostel-Sachs classification, the piano is a simple string instrument. The musician who plays the piano called a pianist.
It consists of a sounding board, to which was added a keyboard, which cause effects by steel cords covered with felt hammers producing sound. The vibrations are transmitted through the bridges to the soundboard, which amplifies them. It consists of a multi-string chromatic harp, driven by an indirect percussion mechanism, which switches have been added.