A close-position chord with the second voice from the top lowered an octave. Sits on four adjacent strings.
EbmMaj7b5 is Eb, Gb, A and D — Ebm7b5 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.

| Eb | Gb | A | D |
|---|---|---|---|
| 1 | ♭3 | ♭5 | 7 |
Rare tonic — a half-diminished chord with its seventh raised instead.
Also written EbmM7b5 or Ebm(maj7)b5. The same chord either way; which spelling you meet depends on who wrote the chart.
Take the four notes stacked as close together as they go, then drop the second voice from the top an octave. The gap it opens is what makes the chord sound like a chord rather than a cluster.
It lands on four adjacent strings, which is why it is the workhorse voicing on guitar.
EbmMaj7b5 has 13 of them, on the top four strings, the middle four strings and the bottom four strings, from open position up to the 13th — every inversion the chord has: Eb in the bass, Gb in the bass, Bbb in the bass and D in the bass. The one to learn first is the Eb shape at the nut, which is the easiest grip here.
5 of them sit on the top four strings, so you can run the inversions up one set without changing strings — which is the whole reason to learn them as a family rather than as separate grips.
Start with xx1232 — no barre and down at the nut. None of the shapes for EbmMaj7b5 uses an open string, so every one of them is movable; the lowest sits at the 1st fret. 2 of the 6 need a barre. Together they cover the neck from the 1st fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| xx1232 | 1st fret | Eb, root position | Gb | all fretted |
| x6x775 | 5th fret | Eb, root position | A | all fretted |
| x6777x | 6th fret | Eb, root position | Gb | barred |
| 11-12-x-11-10-10 | 10th fret | Eb, root position | D | all fretted |
| 11-12-12-11-x-11 | 11th fret | Eb, root position | Eb | barred |
| x-x-13-14-15-14 | 13th fret | Eb, root position | Gb | all fretted |
The same notes rebuilt from scratch give 3 shell, 9 drop 3 and 6 open string voicings, each on its own page.
Tensions. A shell of EbmMaj7b5, root, third and seventh, leaves a string free, and the tones that belong over it are the 11 (Ab) and the b13 (Cb).
Every note of EbmMaj7b5 is in Eb diminished.
Change one note of EbmMaj7b5 and you have Ebdim (drop the major seventh), Ebdim7 (the major seventh becomes a sixth), Ebmaj7b5 (the minor third becomes a major third), Ebm7b5 (the major seventh becomes a flat seventh) or EbmMaj7 (the flat fifth becomes a fifth).
EbmMaj7b5 is a diminished chord — root, minor third, flat fifth. Diminished and half-diminished chords on every root.
On EbmMaj7b5’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.