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

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