C double harmonic scale
The C double harmonic scale consists of the C (Perfect unison), Db (Minor second), E (Major third), F (Perfect fourth), G (Perfect fifth), Ab (Minor sixth) and B (Major seventh) notes.

How to play the C double harmonic scale
- Find C (Root) on the piano keyboard
- Play Db (Minor second) — 1 semitone above C
- Play E (Major third) — 4 semitones above C
- Play F (Perfect fourth) — 5 semitones above C
- Play G (Perfect fifth) — 7 semitones above C
- Play Ab (Minor sixth) — 8 semitones above C
- Play B (Major seventh) — 11 semitones above C
- Play all 7 notes in ascending order to perform the C double harmonic scale