Half diminished scale
| Modes | I, II, III, IV, V, VI, VII |
|---|---|
| Component pitches | |
| C, D, E♭, F, G♭, A♭, B♭, C | |
| Qualities | |
| Number of pitch classes | 7 |
| Forte number | 7-34 |
| Complement | 5-34 |
The half diminished scale is a musical scale more commonly known as "Locrian ♮2", name which avoids confusion with the diminished scales (see octatonic scales) and the half-diminished seventh chord (min. 7, flat 5). It may be considered Mode VI, the sixth mode, of the ascending melodic minor scale. See: jazz scale.
In the key of C, the half-diminished scale built on D is associated with Dmi7♭5, which functions as a iiø chord in minor. See: chord-scale system.
Locrian ♮2 is commonly used in jazz and some rock. It is commonly practiced by such neoclassical metal guitarists Michael Romeo, and such jazz pianists as Oscar Peterson and Jonah Cristall-Clarke.
The half diminished scales, although derived from classical scales, offer new potentials in modern harmonic and melodic structure.
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