|Modes||I, II, III, IV, V, VI, VII|
|C, D, E♭, F, G♭, A♭, B♭|
|Number of pitch classes||7|
The half diminished scale is a seven-note musical scale. It is more commonly known as the Locrian ♮2 scale, a name that avoids confusion with the diminished scale and the half-diminished seventh chord (minor seventh, diminished fifth). It is the sixth mode of the ascending form of the melodic minor scale (or jazz scale).
The Locrian ♮2 scale 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.