A# sus2/D#
The A# sus2 chord consists of the A# (Perfect unison), C (Major second) and F (Perfect fifth) notes, with D# as the bass note.

How to play the A# sus2/D# chord
- Play D# as the lowest bass note in the left hand
- Find A# (Root) on the piano keyboard
- Add C (Major second) — 2 semitones above A#
- Add F (Perfect fifth) — 7 semitones above A#
- Press all 4 notes simultaneously to sound the A# sus2/D# chord