Ab m13/Ebb
The Ab m13 chord consists of the Ab (Perfect unison), Cb (Minor third), Eb (Perfect fifth), Gb (Minor seventh), Bb (Major ninth) and F (Major thirteenth) notes, with Ebb as the bass note.

How to play the Ab m13/Ebb chord
- Play Ebb as the lowest bass note in the left hand
- Find Ab (Root) on the piano keyboard
- Add Cb (Minor third) — 3 semitones above Ab
- Add Eb (Perfect fifth) — 7 semitones above Ab
- Add Gb (Minor seventh) — 10 semitones above Ab
- Add Bb (Major ninth) — 14 semitones above Ab
- Add F (Major thirteenth) — 21 semitones above Ab
- Press all 7 notes simultaneously to sound the Ab m13/Ebb chord