Cm7 chord
C minor seventh
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G
F#
G
G#
A
A#b7
B
C
C#
D
D#
E
F
F#
G
A#
C
C
C#
D
D#b3
E
F
F#
G
G#
A
A#
B
C
D#
E
D#
E
F
F#
G5
G#
A
A#
B
C
C#
D
D#
E
G
A
G#
A
A#
B
C1
C#
D
D#
E
F
F#
G
G#
A
C
3
5
7
10
The Cm7 chord has the formula 1, b3, 5, b7 with notes C, D#, G, A#
The minor seventh chord is commonly used in soul and R&B, among many other genres. The chord works well as the tonic in a minor progression, or as the 2nd degree in the classic ii-V-I jazz turnaround.