CLEF LOCALE is a term used in music to refer to the STAFF, TREBLE, ALTO, BASS, altos, and ROMAN clefs. The STAFF is a five-line musical notation system used to indicate pitch, time signature, and rhythm. TREBLE clef is a six-line musical notation system used to indicate higher pitches. ALTO clef is a four-line musical notation system used to indicate middle pitches. BASS clef is a four-line musical notation system used to indicate lower pitches. Altos are five-line musical notation systems used to indicate higher pitches. ROMAN clef is a five-line musical notation system used to indicate higher pitches. Together, these clefs form the basis of musical notation and are essential for musicians to understand and interpret music.