Db 9
The Db 9 chord consists of the Db (Perfect unison), F (Major third), Ab (Perfect fifth), Cb (Minor seventh) and Eb (Major ninth) notes.

How to play the Db 9 chord
- Find Db (Root) on the piano keyboard
- Add F (Major third) — 4 semitones above Db
- Add Ab (Perfect fifth) — 7 semitones above Db
- Add Cb (Minor seventh) — 10 semitones above Db
- Add Eb (Major ninth) — 14 semitones above Db
- Press all 5 notes simultaneously to sound the Db 9 chord