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Pythagorean limma) Jump to: navigation, search This article is
about the musical interval. For the printing method, see
halftone. Inverse major seventh (for minor second); diminished
octave (for augmented unison); augmented octave (for diminished
unison) Other names minor second or diatonic semitone; augmented
unison and diminished unison or chromatic semitone Abbreviation
m2; A1 Semitones 1 Interval class 1 Just interval 16:15 or 25:24
Equal temperament 100 Just intonation 112 or 71 Minor second
About this sound Play .  A semitone, also called a half step or
a half tone,[1] is the smallest musical interval commonly used
in Western tonal music,[2] and it is considered the most
dissonant[3] when sounded harmonically. It is defined as the
interval between two adjacent notes in a 12-tone scale (e.g.
from C to C). This implies that its size is exactly or
approximately equal to 100 cents, a twelfth of an octave.  In a
12-note approximately equally divided sc