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