Gb9 chord
Gb dominant ninth
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Gb
G
Ab9
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
Ab
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
Bb3
B
C
Db
D
Eb
E
F
Gb
G
Ab
A
Bb
3
5
7
10
The Gb9 chord has the formula 1, 3, b7, 9 with notes Gb, Bb, E, Ab
The dominant ninth chord is mostly used in funk, blues and some rock music. It is usually played without the 5th on the ukulele.