D9
D Dominant 9th
1 3 5 ♭7 9
Notes in D9
DR
F♯3
A5
C♭7
E9
The D9 chord contains 5 notes: D, F♯, A, C, E
Intervals
| Interval | Semitones | Note | Function |
|---|---|---|---|
| R | 0 | D | Root |
| 3 | 4 | F♯ | Major 3rd |
| 5 | 7 | A | Perfect 5th |
| ♭7 | 10 | C | Minor 7th |
| 9 | 2 | E | Major 9th |
About D Dominant 9th Chords
Dominant 9th chords extend the dominant 7th with a 9th, adding richness to blues and funk progressions. James Brown's rhythm guitar was built on 9th chord stabs. They have more color than a plain 7th but stay firmly in dominant territory.
Compatible Scales & Modes
These scales contain all the notes of D9 and can be used for soloing, improvising, and writing melodies over this chord.
D Mixolydian
Contains all the chord tones. The standard scale for dominant 9th chords.
D Blues Scale
Adds grit and attitude over dominant 9th voicings — essential for blues and funk.