Ab 9(#11)

The Ab 9(#11) chord consists of the Ab (Perfect unison), C (Major third), Eb (Perfect fifth), Gb (Minor seventh), Bb (Major ninth) and D (Augmented eleventh) notes.

Piano keyboard showing the notes for a Ab 9(#11) chord

How to play the Ab 9(#11) chord

  1. Find Ab (Root) on the piano keyboard
  2. Add C (Major third) — 4 semitones above Ab
  3. Add Eb (Perfect fifth) — 7 semitones above Ab
  4. Add Gb (Minor seventh) — 10 semitones above Ab
  5. Add Bb (Major ninth) — 14 semitones above Ab
  6. Add D (Augmented eleventh) — 18 semitones above Ab
  7. Press all 6 notes simultaneously to sound the Ab 9(#11) chord

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