A m(addb9)/D#

The A m(addb9) chord consists of the A (Perfect unison), C (Minor third), E (Perfect fifth) and A# (Minor ninth) notes, with D# as the bass note.

Piano keyboard showing the notes for a A m(addb9)/D# chord

How to play the A m(addb9)/D# chord

  1. Play D# as the lowest bass note in the left hand
  2. Find A (Root) on the piano keyboard
  3. Add C (Minor third) — 3 semitones above A
  4. Add E (Perfect fifth) — 7 semitones above A
  5. Add A# (Minor ninth) — 13 semitones above A
  6. Press all 5 notes simultaneously to sound the A m(addb9)/D# chord