B phrygian 13 scale
The B phrygian 13 scale consists of the B (Perfect unison), C (Minor second), D (Minor third), E (Perfect fourth), F (Diminished fifth), G# (Major sixth) and A (Minor seventh) notes.

How to play the B phrygian 13 scale
- Find B (Root) on the piano keyboard
- Play C (Minor second) — 1 semitone above B
- Play D (Minor third) — 3 semitones above B
- Play E (Perfect fourth) — 5 semitones above B
- Play F (Diminished fifth) — 6 semitones above B
- Play G# (Major sixth) — 9 semitones above B
- Play A (Minor seventh) — 10 semitones above B
- Play all 7 notes in ascending order to perform the B phrygian 13 scale