Intervals smaller than a semitone, the smallest interval found in the chromatic scale, are called microtones, most commonly found in non-Western music using scales of more than 12 notes.
Intervals smaller than a semitone are called microtones found in non-Western music. This was most commonly. This non-Western music was using scales of more than 12 notes. A semitone was the smallest interval. This smallest interval was found in the chromatic scale.