Eb m9/Bb
The Eb m9 chord consists of the Eb (Perfect unison), Gb (Minor third), Bb (Perfect fifth), Db (Minor seventh) and F (Major ninth) notes, with Bb as the bass note.

How to play the Eb m9/Bb chord
- Play Bb as the lowest bass note in the left hand
- Find Eb (Root) on the piano keyboard
- Add Gb (Minor third) — 3 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
- Press all 6 notes simultaneously to sound the Eb m9/Bb chord