Treble

Treble refers to the higher part of the audible frequency range as it applies to music and sound reproduction. In general usage, treble covers the high-frequency content of sound, roughly from about 2,000 Hz to 20,000 Hz, though exact boundaries vary by context and listener. In audio equipment, treble is often controlled separately from midrange and bass; treble controls boost or cut high frequencies to alter brightness and perceived detail. Too much treble can cause hiss or sibilance, while too little can leave the sound dull.

In musical notation, treble refers to the treble clef, also known as the G clef. The symbol centers around the second line of the staff, designating that line as the note G above middle C (G4). This clef is used for higher-pitched instruments and voices, such as violin, flute, guitar, and many choral parts. In piano music, the treble clef is used for the upper portion of the grand staff.

Typically, treble is discussed in relation to bass and midrange to describe overall tonal balance. The upper staff in a piano score is written in treble clef, while the lower staff uses the bass clef. In modern sound systems, treble terms refer to the high-frequency range that shapes brightness, air, and intelligibility of consonants, and it interacts with room acoustics and speaker design to determine perceived clarity.