Chord · 9ths
Bdim7/9 — B Diminished 7th / 9th
Bdim7/9 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 B (octave 3) and above in the library's voicing; the same 5 notes in any octave are still Bdim7/9.
- Root
- B
- Quality
- Diminished 7th / 9th
- Formula
- 1 ♭3 ♭5 6 9
- Notes
- B D F G♯ C♯
On the keyboard
The notes of Bdim7/9
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | B | root | B3 |
| ♭3 | D | minor 3rd | D4 |
| ♭5 | F | diminished 5th | F4 |
| 6 | G♯ | major 6th | G♯4 |
| 9 | C♯ | major 9th | C♯5 |
Other 9ths on B
Diminished 7th / 9th chords on every root
Part of the chord reference. See also the scales and the keys.