The standard grips this chord is usually shown with.
Eb9b5 is Eb, G, A, Db and F — Eb7b5 with the natural ninth added over it.
It sounds sleek and tense. Played as a tritone substitution the ♭5 is the root of the dominant it replaced.

| Eb | G | A | Db | F |
|---|---|---|---|---|
| 1 | 3 | ♭5 | ♭7 | 9 |
Altered dominant — commonly the tritone substitute.
Also written Eb9(b5), Eb9-5 or Eb9♭5. The same chord either way; which spelling you meet depends on who wrote the chart.
Eb9b5 in 2nd inversion puts Bbb in the bass instead of Eb, 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 Eb9b5’s 5 common shapes does this: x-12-13-12-14-13.
Start with x67069 — no barre and 1 open string. None of the shapes for Eb9b5 uses an open string, so every one of them is movable; the lowest sits at the 5th fret. 2 of the 5 need a barre. Together they cover the neck from the 5th fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x65665 | 5th fret | Eb, root position | A | barred |
| x67069 | 6th fret | Eb, root position | Db | 1 open string |
| 11-10-11-10-10-11 | 10th fret | Eb, root position | Eb | barred |
| 11-12-11-12-x-13 | 11th fret | Eb, root position | F | all fretted |
| x-12-13-12-14-13 | 12th fret | Bbb, 2nd inversion | F | all fretted |
The same notes rebuilt from scratch give 11 shell, 15 rootless and 1 open string voicings, each on its own page.
Tensions. A shell of Eb9b5, root, third and seventh, leaves a string free, and the tones that belong over it are the b13 (Cb) and the 13 (C).
Eb9b5 is a dominant with its tension raised, so it still points at Ab — harder than a plain seventh does, because the altered tones sit a semitone from where they are going.
Voice by voice, Eb9b5 → Ab. 3 voices move by a semitone, and one note is common to both chords.
| In Eb9b5 | Moves | In Ab |
|---|---|---|
| Eb, the root | stays where it is | Eb, the fifth |
| G, the major third | rises a semitone | Ab, the root |
| A, the flat fifth | falls a semitone | Ab, the root |
| Db, the flat seventh | falls a semitone | C, the major third |
| F, the ninth | falls a whole tone | Eb, the fifth |
Every note of Eb9b5 is in Eb whole tone and Eb lydian dominant.
Change one note of Eb9b5 and you have Eb7b5 (drop the ninth), Eb9 (the flat fifth becomes a fifth), Ebaug9 (the flat fifth becomes a sharp fifth) or Eb9#11 (add the fifth).
Eb9b5 is an altered chord — a dominant seventh with its fifth or ninth moved. Altered dominant chords on every root.
On Eb9b5’s sound and use this page follows Mark Levine, The Jazz Theory Book (Sher Music, 1995). 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.