Mode 7 of Db Harmonic Minor Scale

C Altered Diminished

Space plays and stops
Notes
CDbEbFbGbAbA
Steps
H W H W W H
Intervals
m2 2 m2 2 2 m2

The harmonic minor scale raises the 7th of the natural minor scale. Jazz players use it over a minor tonic, and its 5th mode, Phrygian Dominant, is the classic sound of the V7b9 in a minor key.

C Altered Diminished is the 7th mode of the Db Harmonic Minor Scale: its notes, Db Eb Fb Gb Ab A C, played from C.

Chords it fits