A# 7(b9)

The A# 7(b9) chord consists of the A# (Perfect unison), D (Major third), F (Perfect fifth), G# (Minor seventh) and B (Minor ninth) notes.

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

How to play the A# 7(b9) chord

  1. Find A# (Root) on the piano keyboard
  2. Add D (Major third) — 4 semitones above A#
  3. Add F (Perfect fifth) — 7 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) chord

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