Ab7(#9) chord
The A-flat dominant seventh sharp ninth chord (abbreviated "Ab7(#9) chord") is a five-note chord consisting of the notes A♭, C, E♭, G♭, and B. The chord is formed by adding an augmented ninth to a A-flat dominant seventh chord.
In practice, the fifth (E♭) is often omitted from the Ab7(#9) chord because it's not always possible to play all notes simultaneously.
Name
A-flat dominant seventh sharp ninth chord
Synonym
A-flat dominant sharp ninth chord
Notes
A♭ C E♭ G♭ B
Intervals
1 3 5 ♭7 ♯9
Chord symbol
A♭7(#9)
Alternative symbol
A♭7#9
Type
pentad (five-note chord)