A dominant flat ninth piano chord - A7b9

The A dominant flat ninth chord is a 5-note chord consisting of the notes A, C#, E, G and Bb.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as A7b9.

Interactive piano diagram for the A dominant flat ninth chord

Piano keyboard displaying the A dominant flat ninth chord with the notes A Fb E G C# Db A# Bb

Reduced chords

Chords that are a subset of A7b9. These contain less notes but all of them are included in A7b9.

A 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 A7b9 chord. Feel free to save or share the image as needed.

Piano chord chart for the A dominant flat ninth chord (A7b9). The notes A, C#, E, G and Bb are highlighted.