Db maj11
The Db maj11 chord consists of the Db (Perfect unison), F (Major third), Ab (Perfect fifth), C (Major seventh), Eb (Major ninth) and Gb (Perfect eleventh) notes.

How to play the Db maj11 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 C (Major seventh) — 11 semitones above Db
- Add Eb (Major ninth) — 14 semitones above Db
- Add Gb (Perfect eleventh) — 17 semitones above Db
- Press all 6 notes simultaneously to sound the Db maj11 chord