The standard grips this chord is usually shown with.
Ebaug9 is Eb, G, B, Db and F — Eb7 with the fifth raised and the natural ninth added on top.
It sounds bright, tense and slightly unreal. Raising the fifth leaves no semitone in the lower half of the chord, which is where the whole-tone flavour comes from.

| Eb | G | B | Db | F |
|---|---|---|---|---|
| 1 | 3 | ♯5 | ♭7 | 9 |
Altered dominant — dominant pull with a whole-tone colour.
Also written Eb9#5, Eb+9 or Eb9(#5). The same chord either way; which spelling you meet depends on who wrote the chart.
Ebaug9 in 1st inversion puts G in the bass instead of Eb, 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.
One of Ebaug9’s 7 common shapes does this: 343443.
Start with 11-10-x-10-0-9 — no barre and 1 open string. None of the shapes for Ebaug9 uses an open string, so every one of them is movable; the lowest sits at the 3rd fret. 3 of the 7 need a barre. Together they cover the neck from the 3rd fret to the 13th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| 343443 | 3rd fret | G, 1st inversion | G | barred |
| x65667 | 5th fret | Eb, root position | B | barred |
| 989889 | 8th fret | Db, 3rd inversion | Db | barred |
| 11-10-x-10-0-9 | 9th fret | Eb, root position | Db | 1 open string |
| 11-10-11-10-12-x | 10th fret | Eb, root position | B | all fretted |
| 11-x-11-12-12-13 | 11th fret | Eb, root position | F | all fretted |
| x-x-11-12-12-13 | 11th fret | Db, 3rd inversion | F | all fretted |
The same notes rebuilt from scratch give 8 shell, 14 rootless and 1 open string voicings, each on its own page.
Tensions. A shell of Ebaug9, root, third and seventh, leaves a string free, and the tones that belong over it are the #11 (A).
Ebaug9 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, Ebaug9 → Ab. 3 voices move by a semitone, and one note is common to both chords.
| In Ebaug9 | Moves | In Ab |
|---|---|---|
| Eb, the root | stays where it is | Eb, the fifth |
| G, the major third | rises a semitone | Ab, the root |
| B, the sharp fifth | rises a semitone | C, the major third |
| Db, the flat seventh | falls a semitone | C, the major third |
| F, the ninth | falls a whole tone | Eb, the fifth |
Every note of Ebaug9 is in Eb whole tone.
Change one note of Ebaug9 and you have Ebalt (the ninth becomes a flat ninth), Ebaug7 (drop the ninth), Eb9 (the sharp fifth becomes a fifth) or Eb9b5 (the sharp fifth becomes a flat fifth).
Ebaug9 is an altered chord — a dominant seventh with its fifth or ninth moved. Altered dominant chords on every root.
On Ebaug9’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.