Half diminished scale
ModesI, II, III, IV, V, VI, VII
Component pitches
C, D, E, F, G, A, B
Number of pitch classes7
Forte number7-34

The half diminished scale or Sisyphean Scale is a seven-note musical scale. It is more commonly known as the Locrian 2 scale,[1] 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).

\override Score.TimeSignature #'stencil = ##f
\relative c' {
  \clef treble \time 7/4
  c4^\markup { Half diminished scale on C } d es f ges aes bes c2
} }

In the key of B, the half-diminished scale built on C is associated with Cm75, which functions as a iiø7 chord in minor (see chord-scale system).


  1. ^ Arnold, Bruce. Music Theory Workbook for Guitar: Scale construction and application. muse eek publishing. p. 17. ISBN 1-890944-53-X. Retrieved Jul 10, 2009.