Treble Clef
Clef typically indicative of higher-pitched instruments. The bottom of the clef circles the second-line G.
Alto Clef
Commonly called the viola clef, as the viola typically uses it. Middle C is on the third line, between the “C” shapes of the clef.
Tenor Clef
Also known as a C clef, as middle C is on the fourth line, between the “C” shapes of the clef. Used occasionally by trombone. and bassoons.
Bass Clef
Also known as the F clef, as the two dots surround the fourth-line F. Typically used by low-pitched instruments.