A m6/D
The A m6 chord consists of the A (Perfect unison), C (Minor third), E (Perfect fifth) and F# (Major sixth) notes, with D as the bass note.

How to play the A m6/D chord
- Play D as the lowest bass note in the left hand
- Find A (Root) on the piano keyboard
- Add C (Minor third) — 3 semitones above A
- Add E (Perfect fifth) — 7 semitones above A
- Add F# (Major sixth) — 9 semitones above A
- Press all 5 notes simultaneously to sound the A m6/D chord