A7sus4 chord
A dominant seventh suspended fourth
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>G
F#
Gb7
G#
A
A#
B
C
C#
D
D#
E
F
F#
G
G
C
C
C#
D4
D#
E
F
F#
G
G#
A
A#
B
C
D
E
D#
E5
F
F#
G
G#
A
A#
B
C
C#
D
D#
E
E
A
G#
A1
A#
B
C
C#
D
D#
E
F
F#
G
G#
A
A
3
5
7
10
The A7sus4 chord has the formula 1, 4, 5, b7 with notes A, D, E, G
The seventh suspended fourth chord is a variation of the suspended fourth chord, meaning that it does not have a third and sounds open. This chord can be used to prepare for a resolution down toward a third.