Chord
Cm7♭5 is a half-diminished seventh chord with the notes C, E♭, G♭, B♭. Also written Cø, C–7♭5.
| Note | Interval | Semitones |
|---|---|---|
| C | root | 0 |
| E♭ | minor 3rd | 3 |
| G♭ | diminished 5th | 6 |
| B♭ | minor 7th | 10 |
| Root position | C – E♭ – G♭ – B♭ | |
| 1st inversion | E♭ – G♭ – B♭ – C (Cm7♭5/E♭) | |
| 2nd inversion | G♭ – B♭ – C – E♭ (Cm7♭5/G♭) | |
| 3rd inversion | B♭ – C – E♭ – G♭ (Cm7♭5/B♭) |
A half-diminished chord (m7♭5) is a diminished triad with a minor 7th added. It is the vii chord of major keys and the ii chord of minor keys, as in the minor ii–V–i.
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