What is Microtonality?

Microtonality is the use of musical intervals that are smaller than the standard semitone used in the twelve-tone equal temperament system. These intervals divide the octave into more than the usual twelve pitches, allowing for finer variations in pitch.

In microtonal music, composers may use quarter tones, sixth tones, or other fractional divisions of the octave, creating pitch relationships that do not exist in traditional Western tuning systems. These smaller intervals can produce unique melodic and harmonic effects that sound unfamiliar to listeners accustomed to standard tuning.

Microtonality appears in many non-Western musical traditions, as well as in modern and experimental Western composition. Composers such as Alois Hába, Harry Partch, and Julián Carrillo explored microtonal systems to expand the range of musical expression beyond the conventional twelve-note scale.