D9 guitar chord
The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped.
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About D9 — drop 3 voicings
D9 is D, F#, A, C and E — D7 with the ninth stacked on top.
It sounds bright and full, still clearly pulling. The ninth adds height without softening the tritone underneath it, which is why funk and soul comp on this rather than on a plain 7.
D9 notes and formula
| D | F# | A | C | E |
|---|---|---|---|---|
| 1 | 3 | 5 | ♭7 | 9 |
Dominant — the same pull as a 7, with more colour.
Also written Ddom9 or D dominant 9. The same chord either way; which spelling you meet depends on who wrote the chart.
How to play D9
The same operation one voice further down: the third voice from the top falls an octave and becomes the bass.
That leaves a bigger hole under the top three notes, so a string gets skipped: the muted string in the middle is the shape, not a mistake.
D9 has 8 of them, on strings 5-3-2-1 and strings 6-4-3-2, from the 2nd fret up to the 11th — every inversion the chord has: D in the bass, F# in the bass, C in the bass and E in the bass. The one to learn first is the D shape at the 2nd fret.
4 of them sit on strings 5-3-2-1, 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 10-9-10-9-x-x — no barre. None of the shapes for D9 uses an open string, so every one of them is movable; the lowest sits at the 4th fret. 6 of the 9 need a barre. Together they cover the neck from the 4th fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x54555 | 4th fret | D, root position | A | barred |
| x70778 | 7th fret | E, 9th in the bass | C | barred |
| x77778 | 7th fret | E, 9th in the bass | C | barred |
| 10-7-7-9-7-8 | 7th fret | D, root position | C | barred |
| 10-9-10-9-x-x | 9th fret | D, root position | E | all fretted |
| 10-12-10-9-10-12 | 9th fret | D, root position | E | barred |
| 10-12-10-11-10-12 | 10th fret | D, root position | E | barred |
| x-x-12-11-13-12 | 11th fret | D, root position | E | all fretted |
| 14-x-12-14-13-12 | 12th fret | F#, 1st inversion | E | all fretted |
The same notes rebuilt from scratch give 3 shell, 12 drop 2, 13 rootless and 6 open string voicings, each on its own page.
Tensions. A shell of D9, root, third and seventh, leaves a string free, and the tones that belong over it are the #11 (G#), the b13 (Bb) and the 13 (B).
How to use D9
D9 is the V of G, and that is where it goes if it goes anywhere: the third and the flat seventh are a tritone apart, and both resolve by a semitone into G.
Voice by voice, D9 → G. 2 voices move by a semitone, and one note is common to both chords.
| In D9 | Moves | In G |
|---|---|---|
| D, the root | stays where it is | D, the fifth |
| F#, the major third | rises a semitone | G, the root |
| A, the fifth | falls a whole tone | G, the root |
| C, the flat seventh | falls a semitone | B, the major third |
| E, the ninth | falls a whole tone | D, the fifth |
In which keys. Every note of D9 belongs to E minor (the ♭VII) and G major (the V, the dominant).
What to play over D9
Every note of D9 is in D mixolydian and D lydian dominant.
Chords near D9
Change one note of D9 and you have Dmaj9 (the flat seventh becomes a major seventh), Dm9 (the major third becomes a minor third), Dadd9 (drop the flat seventh), D69 (the flat seventh becomes a sixth), D7 (drop the ninth) or D9b5 (the fifth becomes a flat fifth).
D9 is a dominant chord — root, major third, fifth, minor seventh. Dominant seventh chords on every root.
On D9’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.