A# 7(b9)(no5)/D#

The A# 7(b9)(no5) chord consists of the A# (Perfect unison), D (Major third), G# (Minor seventh) and B (Minor ninth) notes, with D# as the bass note.

Piano keyboard showing the notes for a A# 7(b9)(no5)/D# chord

How to play the A# 7(b9)(no5)/D# chord

  1. Play D# as the lowest bass note in the left hand
  2. Find A# (Root) on the piano keyboard
  3. Add D (Major third) — 4 semitones above A#
  4. Add G# (Minor seventh) — 10 semitones above A#
  5. Add B (Minor ninth) — 13 semitones above A#
  6. Press all 5 notes simultaneously to sound the A# 7(b9)(no5)/D# chord