E7b5 chord
E dominant seventh flat five
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G
F#
G
G#3
A
A#
B
C
C#
D
D#
E
F
F#
G
G#
C
C
C#
Db7
D#
E
F
F#
G
G#
A
A#
B
C
D
E
D#
E1
F
F#
G
G#
A
A#
B
C
C#
D
D#
E
E
A
G#
A
A#b5
B
C
C#
D
D#
E
F
F#
G
G#
A
A#
3
5
7
10
The E7b5 chord has the formula 1, 3, b5, b7 with notes E, G#, A#, D
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.