Eb 11/Gb
The Eb 11 chord consists of the Eb (Perfect unison), G (Major third), Bb (Perfect fifth), Db (Minor seventh), F (Major ninth) and Ab (Perfect eleventh) notes, with Gb as the bass note.

How to play the Eb 11/Gb chord
- Play Gb as the lowest bass note in the left hand
- Find Eb (Root) on the piano keyboard
- Add G (Major third) — 4 semitones above Eb
- Add Bb (Perfect fifth) — 7 semitones above Eb
- Add Db (Minor seventh) — 10 semitones above Eb
- Add F (Major ninth) — 14 semitones above Eb
- Add Ab (Perfect eleventh) — 17 semitones above Eb
- Press all 7 notes simultaneously to sound the Eb 11/Gb chord