Am7b5 chord
A half diminished seventh
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ukulele fretboard
G
F#
G
G#
A1
A#
B
C
C#
D
D#
E
F
F#
G
A
C
C
C#
D
D#b5
E
F
F#
G
G#
A
A#
B
C
D#
E
D#
E
F
F#
Gb7
G#
A
A#
B
C
C#
D
D#
E
G
A
G#
A
A#
B
Cb3
C#
D
D#
E
F
F#
G
G#
A
C
3
5
7
10
The Am7b5 chord has the formula 1, b3, b5, b7 with notes A, C, D#, G
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.