Chord · 9ths
B9 — B Dominant 9th
B9 is the B dominant 9th chord. It is built on the root B with major 3rd (D♯), perfect 5th (F♯), minor 7th (A) and major 9th (C♯) above it — the formula 1 3 5 ♭7 9, sounding the notes B D♯ F♯ A 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 B9.
- Root
- B
- Quality
- Dominant 9th
- Formula
- 1 3 5 ♭7 9
- Notes
- B D♯ F♯ A C♯
On the keyboard
Right-hand fingering for this voicing: 1–2–3–4–5 (1 is the thumb).
The notes of B9
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | B | root | B3 |
| 3 | D♯ | major 3rd | D♯4 |
| 5 | F♯ | perfect 5th | F♯4 |
| ♭7 | A | minor 7th | A4 |
| 9 | C♯ | major 9th | C♯5 |
Other 9ths on B
Dominant 9th chords on every root
Part of the chord reference. See also the scales and the keys.