Chord
B♭m7 is a minor seventh chord with the notes B♭, D♭, F, A♭. Also written B♭min7, B♭–7, B♭mi7. The same chord spelled from A♯ is A♯m7.
| Note | Interval | Semitones |
|---|---|---|
| B♭ | root | 0 |
| D♭ | minor 3rd | 3 |
| F | perfect 5th | 7 |
| A♭ | minor 7th | 10 |
| Root position | B♭ – D♭ – F – A♭ | |
| 1st inversion | D♭ – F – A♭ – B♭ (B♭m7/D♭) | |
| 2nd inversion | F – A♭ – B♭ – D♭ (B♭m7/F) | |
| 3rd inversion | A♭ – B♭ – D♭ – F (B♭m7/A♭) |
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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