The standard grips this chord is usually shown with.
BbmMaj11 is Bb, Db, F, A, C and Eb — BbmMaj9 with the eleventh added on top.
It sounds dense and unresolved. Something is always omitted; the ♭3 and the natural 7 are what must not be.

| Bb | Db | F | A | C | Eb |
|---|---|---|---|---|---|
| 1 | ♭3 | 5 | 7 | 9 | 11 |
Minor tonic — the melodic minor as far up as a guitar carries it.
Also written BbmM11 or Bbm(maj11). The same chord either way; which spelling you meet depends on who wrote the chart.
BbmMaj11 in 2nd inversion puts F in the bass instead of Bb, the 5th 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.
One of BbmMaj11’s 7 common shapes does this: x-8-8-8-10-9.
Start with x-x-8-8-10-9 — no barre. None of the shapes for BbmMaj11 uses an open string, so every one of them is movable; the lowest sits at the 1st fret. 5 of the 7 need a barre. Together they cover the neck from the 1st fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x11221 | 1st fret | Bb, root position | F | barred |
| x11331 | 1st fret | Bb, root position | F | barred |
| 667668 | 6th fret | Bb, root position | C | barred |
| x-x-8-8-10-9 | 8th fret | Bb, root position | Db | all fretted |
| x-8-8-8-10-9 | 8th fret | F, 2nd inversion | Db | barred |
| x-13-11-14-13-11 | 11th fret | Bb, root position | Eb | all fretted |
| x-13-13-14-14-13 | 13th fret | Bb, root position | F | barred |
The same notes rebuilt from scratch give 4 shell, 13 drop 2, 8 drop 3 and 25 rootless voicings, each on its own page.
Tensions. A shell of BbmMaj11, root, third and seventh, leaves a string free, and the tones that belong over it are the 13 (G).
How you get to it. The turn that lands on BbmMaj11 is Cm7♭5 to F7♭9: the ii and the V of Bb minor, which is where a minor tonic is usually arrived at rather than simply begun on.
Every note of BbmMaj11 is in Bb harmonic minor and Bb melodic minor.
Change one note of BbmMaj11 and you have Bbmaj11 (the minor third becomes a major third), Bbm11 (the major seventh becomes a flat seventh) or BbmMaj9 (drop the fourth).
BbmMaj11 is a minor chord — root, minor third, fifth. Minor chords on every root.
On BbmMaj11’s sound and use this page follows Ted Pease & Ken Pullig, Modern Jazz Voicings (Berklee Press, 2001). 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.