The standard grips this chord is usually shown with.
Bmadd9 is B, D, F# and C# — Bm with the ninth added, and no seventh.
It sounds sharp-edged. The ninth grinding a whole step under the minor third is the edge an m9 softens.

| B | D | F# | C# |
|---|---|---|---|
| 1 | ♭3 | 5 | 9 |
Minor tonic — a triad with one colour on it.
Also written Bm(add9), Bmin(add9) or B-add9. The same chord either way; which spelling you meet depends on who wrote the chart.
Bmadd9 in 1st inversion puts D in the bass instead of B, the 3rd of the chord. The notes are the same; what changes is what the bass line does, which is most of why you would reach for it — it lets the lowest voice move by step where the root would have jumped.
2 of Bmadd9’s 7 common shapes do this: x5442x, x-x-12-11-12-9.
Start with x5442x — no barre and down at the nut. None of the shapes for Bmadd9 uses an open string, so every one of them is movable; the lowest sits at the 2nd fret. 2 of the 7 need a barre. Together they cover the neck from the 2nd fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x5442x | 2nd fret | D, 1st inversion | C# | all fretted |
| 75067x | 5th fret | B, root position | F# | 1 open string |
| 799779 | 7th fret | B, root position | C# | barred |
| xx9779 | 7th fret | B, root position | C# | all fretted |
| x-x-12-11-12-9 | 9th fret | D, 1st inversion | C# | all fretted |
| x-14-12-11-14-x | 11th fret | B, root position | C# | all fretted |
| x-14-12-x-14-14 | 12th fret | B, root position | F# | barred |
The same notes rebuilt from scratch give 12 drop 2, 8 drop 3 and 2 open string voicings, each on its own page.
How you get to it. The turn that lands on Bmadd9 is C#m7♭5 to F#7♭9: the ii and the V of B minor, which is where a minor tonic is usually arrived at rather than simply begun on.
In which keys. Every note of Bmadd9 belongs to D major (the vi, the submediant), F# minor (the iv, the subdominant), A major (the ii, the supertonic) and B minor (the i, the tonic).
Every note of Bmadd9 is in B dorian, B natural minor, B harmonic minor and B melodic minor.
Change one note of Bmadd9 and you have Bm (drop the ninth), Bsus2 (drop the minor third), Bsus2sus4 (the minor third becomes a fourth), Bm6 (the ninth becomes a sixth), Bm69 (add the sixth) or Bm7 (the ninth becomes a flat seventh).
Bmadd9 is a minor chord — root, minor third, fifth. Minor chords on every root.
On Bmadd9’s sound and use this page follows Robert Rawlins & Nor Eddine Bahha, Jazzology (Hal Leonard, 2005). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.