Amadd9 chord
A minor added ninth
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>G
F#
G
G#
A1
A#
B
C
C#
D
D#
E
F
F#
G
A
C
Cb3
C#
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#
A
A#
B9
C
C#
D
D#
E
F
F#
G
G#
A
B
3
5
7
10
The Amadd9 chord has the formula 1, b3, 5, 9 with notes A, C, E, B
The minor added ninth chord can be built by taking a minor chord and adding the 9th of the scale. It serves a similar purpose to the minor chord, with the additional ninth extension for flavor.