A#7 chord
A# dominant seventh
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>G
F#
G
G#b7
A
A#
B
C
C#
D
D#
E
F
F#
G
G#
C
C
C#
D3
D#
E
F
F#
G
G#
A
A#
B
C
D
E
D#
E
F5
F#
G
G#
A
A#
B
C
C#
D
D#
E
F
A
G#
A
A#1
B
C
C#
D
D#
E
F
F#
G
G#
A
A#
3
5
7
10
The A#7 chord has the formula 1, 3, 5, b7 with notes A#, D, F, G#
The dominant seventh chord is a mildly dissonant variation of the major chord that is used in many genres, like blues, funk, and rock. In blues, entire progressions can be composed of dominant seventh chords.