A sharp dominant flat ninth piano chord - A#7b9

The A sharp dominant flat 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#7b9.

Interactive piano diagram for the A sharp dominant flat ninth chord

Piano keyboard displaying the A sharp dominant flat ninth chord with the notes A# Bb D E# F Cb B G# Ab

Reduced chords

Chords that are a subset of A#7b9. These contain less notes but all of them are included in A#7b9.

A sharp dominant flat 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#7b9 chord. Feel free to save or share the image as needed.

Piano chord chart for the A sharp dominant flat ninth chord (A#7b9). The notes A#, C##, E#, G# and B are highlighted.