B-flat Phrygian scale
The B-flat Phrygian 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 degree lowered a half step.
The B-flat Phrygian scale is a mode of the G-flat major scale. It contains the same notes but starts on the third degree of the major scale.