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D add 9 chord on bass (Dadd9)
Also called or written Dadd9, D or D Add 9th
D add 9 is built from D, F♯, A, and E. This advanced voicing sits at the 12th fret, requiring a wide finger stretch.
Dadd9/E inversionfrom fret 11
How it is built
Formula 1, 3, 5, 9
- Root positionD–F♯–A–EDadd9no shape on this instrument
- First inversionF♯–A–E–DDadd9/F♯no shape on this instrument
- Second inversionA–E–D–F♯Dadd9/Ano shape on this instrument
- Third inversionE–D–F♯–ADadd9/E12-12-12-11
How do you play a D add 9 chord on bass?
D add 9 is played at the 11th fret as 12 12 12 11: middle finger on the E string at fret 12, ring finger on the A string at fret 12, pinky finger on the D string at fret 12 and index finger on the G string at fret 11.
Full note and interval breakdown
| String | Fret | Finger | Note |
|---|---|---|---|
| 4 (E) | 12 | 2 | E (2) |
| 3 (A) | 12 | 3 | A (5) |
| 2 (D) | 12 | 4 | D (1) |
| 1 (G) | 11 | 1 | F♯ (3) |
AdvancedThe stretch between the index finger on the 11th fret and the pinky on the 12th fret of the D string is demanding.
Why it sounds like that
D add 9 uses the formula 1, 3, 5, 9. The major 2nd between D and E adds the ninth, while the major 3rd from D to F♯ gives the major quality. Compare it with D major, which lacks the ninth.
What goes wrong with D add 9?
- Letting the index finger collapse and mute the G string.
- Fretting the D string with the pinky at an angle, causing a buzz.
When to use it
D add 9 functions as the tonic in D major, fitting the I–IV–V–I progression: D major–G major–A major–D major. It suits rock, pop, and folk styles where the ninth adds brightness. It also works over D major and D 5th chords.
Changing to and from D add 9
- Slide the shape down two frets to the 9th fret for C add 9.
- Move to D major by lifting the index finger and playing the open D string.
Which voicing to use
The default voicing places E in the bass, softening the root emphasis. Use this inversion when the bass line needs to connect stepwise or when the root is covered by another instrument.
Other D chords
Common questions
How does D add 9 differ from D major?
D add 9 includes the ninth, E, which D major omits. The added note creates a brighter, more open sound while keeping the major third.
Can D add 9 be used in minor keys?
D add 9 is diatonic to E natural minor and B natural minor. In those keys it acts as a borrowed major chord, often for modal interchange.
What is the best way to practice the stretch in D add 9?
Practice moving between D add 9 and D major slowly, keeping fingers close to the fretboard. Gradually increase speed while maintaining clean note separation.