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Major family

A added ninth chord

Aadd9

A added ninth

Piano root position

  • Root
  • 3
  • 5
  • 9

Guitar standard tuning

Open chord

Uses open strings, no barre.

E×ADGBe12345EBC♯

Finger: 1 index, 2 middle, 3 ring, 4 little

Notation treble clef

𝄞♯

Intervals

12 semitones
  1. A1
  2. ♭2
  3. B9
  4. ♭3
  5. C♯3
  6. 4
  7. ♭5
  8. E5
  9. ♯5
  10. 6
  11. ♭7
  12. 7
  • A Root
  • C♯ Major 3rd
  • E Perfect 5th
  • B Major 9th

About this chord

What is an A added ninth chord?

Aadd9 is built from 4 notes: A (the root), C♯ (the 3), E (the 5), B (the 9). A major triad with a shimmering ninth, without the seventh.

Notes
A · C♯ · E · B
Formula
1 · 3 · 5 · 9
Also written
Aadd2
Found in
Outside the major and minor keys

Scales that contain Aadd9

Neighbours

Chords close to Aadd9

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All 348 chords

Every chord type on every root, each with its own page.

C

D♭

D

E♭

E

F

G♭

G

A♭

A

B♭

B