Am9 chord
A minor 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#
E
F
F#
Gb7
G#
A
A#
B
C
C#
D
D#
E
G
A
G#
A
A#
B9
C
C#
D
D#
E
F
F#
G
G#
A
B
3
5
7
10
The Am9 chord has the formula 1, b3, b7, 9 with notes A, C, G, B
The minor ninth chord is used in gospel, R&B, soul and jazz. It is very versatile in R&B progressions, and works well as a smooth chord to end off a chord progression.