Chord · 11ths
B♭m7♭5/11 — B♭ Half-Diminished / 11th
B♭m7♭5/11 is the B♭ half-diminished / 11th chord. It is built on the root B♭ with minor 3rd (D♭), diminished 5th (F♭), minor 7th (A♭) and perfect 11th (E♭) above it — the formula 1 ♭3 ♭5 ♭7 11, sounding the notes B♭ D♭ F♭ A♭ E♭. On the piano it sits at Bb (octave 3) and above in the library's voicing; the same 5 notes in any octave are still B♭m7♭5/11.
- Root
- B♭
- Quality
- Half-Diminished / 11th
- Formula
- 1 ♭3 ♭5 ♭7 11
- Notes
- B♭ D♭ F♭ A♭ E♭
On the keyboard
The notes of B♭m7♭5/11
| 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 |
| 11 | E♭ | perfect 11th | E♭5 |
Other 11ths on B♭
Half-Diminished / 11th chords on every root
Part of the chord reference. See also the scales and the keys.