Gbm7b5 chord
Gb half diminished seventh
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>G
Gb
G
Ab
Ab3
Bb
B
C
Db
D
Eb
E
F
Gb
G
A
C
C
Db
D
Eb
Eb7
F
Gb
G
Ab
A
Bb
B
C
E
E
Eb
E
F
Gb1
G
Ab
A
Bb
B
C
Db
D
Eb
E
Gb
A
Ab
A
Bb
B
Cb5
Db
D
Eb
E
F
Gb
G
Ab
A
C
3
5
7
10
The Gbm7b5 chord has the formula 1, b3, b5, b7 with notes Gb, A, C, E
The half diminished seventh chord is a variation of the minor seventh chord and is found in pop, R&B and jazz. It is typically used as a versatile passing chord and its feel is defined by the chord that follows it.