Chord
Cm7 is a minor seventh chord with the notes C, E♭, G, B♭. Also written Cmin7, C–7, Cmi7.
| Note | Interval | Semitones |
|---|---|---|
| C | root | 0 |
| E♭ | minor 3rd | 3 |
| G | perfect 5th | 7 |
| B♭ | minor 7th | 10 |
| Root position | C – E♭ – G – B♭ | |
| 1st inversion | E♭ – G – B♭ – C (Cm7/E♭) | |
| 2nd inversion | G – B♭ – C – E♭ (Cm7/G) | |
| 3rd inversion | B♭ – C – E♭ – G (Cm7/B♭) |
Take a minor triad (root, minor 3rd, perfect 5th) and add a minor 7th above the root. The minor seventh chord is the ii chord of major keys, the classic start of a ii–V–I progression.
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