Half Diminished Scale
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Half Diminished Scale
Half diminished scale on C About this sound Play .
Half diminished scale
Modes I, II, III, IV, V, VI, VII
Component pitches
C, D, E?, F, G?, A?, B?
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",[1] name which avoids confusion with the diminished scales (see octatonic scales) and the half-diminished seventh chord (minor seventh, diminished fifth). 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 Dm7?5, which functions as a iiø7 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.[clarification needed]


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