Tools / Chords / D add 9

D add 9 chord on bass (Dadd9)

Also 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 inversion12-12-12-11

How it’s built

D1Root

F♯3Major 3rd

A5Perfect 5th

E99th

Formula 1, 3, 5, 9

Inversions

The same three notes, with a different one in the bass.

Root positionD–F♯–A–EDadd9Bass D

First inversionF♯–A–E–DDadd9/F♯Bass F♯

Second inversionA–E–D–F♯Dadd9/ABass A

Third inversionE–D–F♯–ADadd9/EBass E

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.

How do you play a D add 9 chord on bass?

Dadd9/E inversion

Intermediate● On the diagram

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.

Tip — The stretch between the index finger on the 11th fret and the pinky on the 12th fret of the D string is demanding.

String-by-string breakdown

String	Fret	Finger	Note
4 (E)	12	2	E (9)
3 (A)	12	3	A (5)
2 (D)	12	4	D (1)
1 (G)	11	1	F♯ (3)

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.

String

Fret

Finger

Note

4 (E)

E (9)

3 (A)

A (5)

2 (D)

D (1)

1 (G)

F♯ (3)