Chord
Bm7♭5 is a half-diminished seventh chord with the notes B, D, F, A. Also written Bø, B–7♭5.
| Note | Interval | Semitones |
|---|---|---|
| B | root | 0 |
| D | minor 3rd | 3 |
| F | diminished 5th | 6 |
| A | minor 7th | 10 |
| Root position | B – D – F – A | |
| 1st inversion | D – F – A – B (Bm7♭5/D) | |
| 2nd inversion | F – A – B – D (Bm7♭5/F) | |
| 3rd inversion | A – B – D – F (Bm7♭5/A) |
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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