A-flat Locrian scale
The A-flat Locrian scale is a seven-note scale consisting of the notes A♭, B♭♭, C♭, D♭, E♭♭, F♭, and G♭. The scale corresponds to a A-flat natural minor scale with the second and fifth degree lowered a half step.
The A-flat Locrian scale is a mode of the B-double-flat major scale. It contains the same notes but starts on the seventh degree of the major scale.