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