A chord
A major
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G
F#
G
G#
A1
A#
B
C
C#
D
D#
E
F
F#
G
A
C
C
C#3
D
D#
E
F
F#
G
G#
A
A#
B
C
C#
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 A chord has the formula 1, 3, 5 with notes A, C#, E
The major chord is one of the basic triads and can be found in every genre of music. It is characteristically happy and often serves as a basis for forming more complex chords.