A#7(#9) chord
The A-sharp dominant seventh sharp ninth chord (abbreviated "A#7(#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-sharp dominant seventh chord.
In practice, the fifth (E♯) is often omitted from the A#7(#9) chord because it's not always possible to play all notes simultaneously.
Name
A-sharp dominant seventh sharp ninth chord
Synonym
A-sharp 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)