A 7(#9)

The A 7(#9) chord consists of the A (Perfect unison), C# (Major third), E (Perfect fifth), G (Minor seventh) and C (Minor tenth) notes.

Piano keyboard showing the notes for a A 7(#9) chord

How to play the A 7(#9) chord

  1. Find A (Root) on the piano keyboard
  2. Add C# (Major third) — 4 semitones above A
  3. Add E (Perfect fifth) — 7 semitones above A
  4. Add G (Minor seventh) — 10 semitones above A
  5. Add C (Minor tenth) — 15 semitones above A
  6. Press all 5 notes simultaneously to sound the A 7(#9) chord

Related slash chords