Bb m7/A
The Bb m7 chord consists of the Bb (Perfect unison), Db (Minor third), F (Perfect fifth) and Ab (Minor seventh) notes, with A as the bass note.

How to play the Bb m7/A chord
- Play A as the lowest bass note in the left hand
- Find Bb (Root) on the piano keyboard
- Add Db (Minor third) — 3 semitones above Bb
- Add F (Perfect fifth) — 7 semitones above Bb
- Add Ab (Minor seventh) — 10 semitones above Bb
- Press all 5 notes simultaneously to sound the Bb m7/A chord