C#m9 chord
C# minor ninth
<
1 / 6
>
G
F#
G
G#
A
A#
Bb7
C
C#
D
D#
E
F
F#
G
B
C
C
C#
D
D#9
E
F
F#
G
G#
A
A#
B
C
D#
E
D#
Eb3
F
F#
G
G#
A
A#
B
C
C#
D
D#
E
E
A
G#
A
A#
B
C
C#1
D
D#
E
F
F#
G
G#
A
C#
3
5
7
10
The C#m9 chord has the formula 1, b3, b7, 9 with notes C#, E, B, D#
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.