A sharp dominant ninth piano chord - A#9

The A sharp dominant ninth chord is a 5-note chord consisting of the notes A#, C##, E#, G# and B#.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as A#9.

Interactive piano diagram for the A sharp dominant ninth chord

Piano keyboard displaying the A sharp dominant ninth chord with the notes A#BbDE#FG#AbB#C

Extended Chords

Chords that are a superset of A#9. The chords include more notes but always A#, C##, E#, G# and B#.

Reduced chords

Chords that are a subset of A#9. These contain less notes but all of them are included in A#9.

Scales with A#9

Below you find all scales that include A#9:

  • bebop
  • mixolydian
  • mixolydian b6
  • lydian dominant
  • lydian minor
  • bebop minor
  • composite blues
  • messiaen's mode #3
  • chromatic

A sharp dominant ninth piano chord chart image

In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the A#9 chord. Feel free to save or share the image as needed.

Piano chord chart for the A sharp dominant ninth chord (A#9). The notes A#, C##, E#, G# and B# are highlighted.