Chord · 9ths
B♭dim7/9 — B♭ Diminished 7th / 9th
B♭dim7/9 is the B♭ diminished 7th / 9th chord. It is built on the root B♭ with minor 3rd (D♭), diminished 5th (F♭), major 6th (G) and major 9th (C) above it — the formula 1 ♭3 ♭5 6 9, sounding the notes B♭ D♭ F♭ G C. 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♭dim7/9.
- Root
- B♭
- Quality
- Diminished 7th / 9th
- Formula
- 1 ♭3 ♭5 6 9
- Notes
- B♭ D♭ F♭ G C
On the keyboard
The notes of B♭dim7/9
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | B♭ | root | B♭3 |
| ♭3 | D♭ | minor 3rd | D♭4 |
| ♭5 | F♭ | diminished 5th | F♭4 |
| 6 | G | major 6th | G4 |
| 9 | C | major 9th | C5 |
Other 9ths on B♭
Diminished 7th / 9th chords on every root
Part of the chord reference. See also the scales and the keys.