clefs

Signs placed at the beginning of the staff and named after the note they refer to.

C clef

Rarely used clef indicating that the line chosen (first, third or fourth) corresponds to the note C; its use is more specialized.

F clef

Key indicating that the fourth line of the staff corresponds to the note F; it is used to write notes in the middle and bass registers.

G clef

Key indicating that the second line of the staff corresponds to the note G; it is used to write notes in the middle and treble registers.