Singing is the art of creating music with the voice. It is the oldest form of musical expression, and the human voice can be considered the first musical instrument.[1] The definition of singing varies across sources.[1] Some sources define singing as the act of creating musical sounds with the voice.[2][3][4] Other common definitions include "the utterance of words or sounds in tuneful succession"[1] or "the production of musical tones by means of the human voice".[5] >