BmMaj7b5 guitar chord
Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top.
- Tap a note to hear it
- Arrows change position
- Fingers, notes or intervals
- Play the chord
About BmMaj7b5 — shell voicings
BmMaj7b5 is B, D, F and A# — Bm7b5 with the seventh raised a semitone.
It sounds brittle and impossible to mistake. Scarce enough that most players meet it as a passing sonority rather than as a chord they chose.
BmMaj7b5 notes and formula
| B | D | F | A# |
|---|---|---|---|
| 1 | ♭3 | ♭5 | 7 |
Rare tonic — a half-diminished chord with its seventh raised instead.
Also written BmM7b5 or Bm(maj7)b5. The same chord either way; which spelling you meet depends on who wrote the chart.
How to play BmMaj7b5
Root, third and seventh. The third and seventh, the guide tones, are what make the chord major, minor or dominant, so the fifth can go: it says nothing the symbol needs.
Three notes means a spare string, which is the real point. Put a tension on it.
BmMaj7b5 has 6 of them, on strings 5-3-2-1, the middle four strings, strings 6-4-3-2 and the bottom four strings, from open position up to the 13th — all in one inversion, so the bass note never moves. The one to learn first is the B shape at the nut.
Start with x-x-9-10-11-10 — no barre. None of the shapes for BmMaj7b5 uses an open string, so every one of them is movable; the lowest sits at the 2nd fret. 3 of the 6 need a barre. Together they cover the neck from the 2nd fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x2333x | 2nd fret | B, root position | D | barred |
| 78x766 | 6th fret | B, root position | A# | all fretted |
| 7887x7 | 7th fret | B, root position | B | barred |
| x-x-9-10-11-10 | 9th fret | B, root position | D | all fretted |
| x-14-x-15-15-13 | 13th fret | B, root position | F | all fretted |
| x-14-15-15-15-x | 14th fret | B, root position | D | barred |
The same notes rebuilt from scratch give 15 drop 2, 10 drop 3 and 6 open string voicings, each on its own page.
Tensions. A shell of BmMaj7b5, root, third and seventh, leaves a string free, and the tones that belong over it are the 11 (E) and the b13 (G).
What to play over BmMaj7b5
Every note of BmMaj7b5 is in B diminished.
Chords near BmMaj7b5
Change one note of BmMaj7b5 and you have Bdim (drop the major seventh), Bdim7 (the major seventh becomes a sixth), Bmaj7b5 (the minor third becomes a major third), Bm7b5 (the major seventh becomes a flat seventh) or BmMaj7 (the flat fifth becomes a fifth).
BmMaj7b5 is a diminished chord — root, minor third, flat fifth. Diminished and half-diminished chords on every root.
On BmMaj7b5’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.