Bb7b5 chord
Bb dominant seventh flat five
<
1 / 6
>G
Gb
G
Abb7
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
Ab
C
C
Db
D3
Eb
E
F
Gb
G
Ab
A
Bb
B
C
D
E
Eb
Eb5
F
Gb
G
Ab
A
Bb
B
C
Db
D
Eb
E
E
A
Ab
A
Bb1
B
C
Db
D
Eb
E
F
Gb
G
Ab
A
Bb
3
5
7
10
The Bb7b5 chord has the formula 1, 3, b5, b7 with notes Bb, D, E, Ab
The seventh flat five chord is a variation of the dominant seventh chord. It is sometimes used as a passing chord in jazz tunes to resolve at a major or minor seventh chord one half-step down.