A clef (French: clef "major") is a rhythmic sign made use of to suggest the pitch of written notes. Placed on one of the lines at the beginning of the stave, it indicates the name and also pitch of the notes on that line. This line serves as a reference point by which the names of the notes on other line or space of the state may be determined. Simply one clef that references a note in a room rather than on a line has definitely at any time before been made use of.

There are three varieties of clef used in present day music and songs notation: F, C, as well as G. Each sort of clef designates an assorted reference note to the line on which it is put. When one of these clefs has actually been put on one of the lines of the stave, the many other lines as well as rooms can be checked out in relationship to it.