Chord · 7ths
B♭m7♭5 — B♭ Half-Diminished
B♭m7♭5 is the B♭ half-diminished chord. It is built on the root B♭ with minor 3rd (D♭), diminished 5th (F♭) and minor 7th (A♭) above it — the formula 1 ♭3 ♭5 ♭7, sounding the notes B♭ D♭ F♭ A♭. On the piano it sits at Bb (octave 3) and above in the library's voicing; the same 4 notes in any octave are still B♭m7♭5.
- Root
- B♭
- Quality
- Half-Diminished
- Formula
- 1 ♭3 ♭5 ♭7
- Notes
- B♭ D♭ F♭ A♭
On the keyboard
Right-hand fingering for this voicing: 1–2–3–5 (1 is the thumb).
The notes of B♭m7♭5
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | B♭ | root | B♭3 |
| ♭3 | D♭ | minor 3rd | D♭4 |
| ♭5 | F♭ | diminished 5th | F♭4 |
| ♭7 | A♭ | minor 7th | A♭4 |
Other 7ths on B♭
Half-Diminished chords on every root
Part of the chord reference. See also the scales and the keys.