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

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