The B-sharp dominant seventh flat five chord (abbreviated "B#7(b5) chord") is a four-note chord consisting of the notes B, D, F, and A. The chord is formed by lowering the fifth of a B-sharp dominant seventh chord a half step.

Name
B-sharp dominant seventh flat five chord
Notes
B D F A
Intervals
1 3 5 7
Chord symbol
B7(b5)
Alternative symbol
B7b5
Type
tetrad (four-note chord)

B#7(b5) chord on piano

B#7(b5) chord on guitar

B#7(b5) chord on ukulele

B#7(b5) chord on the staff