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Dominant family

A dominant seventh flat nine chord

A7♭9

A dominant seventh flat nine

Piano root position

  • Root
  • 3
  • 5
  • ♭7
  • ♭9

Guitar standard tuning

Barre · fret 11

Lay your index flat across strings 4 to 2 at fret 11.

E×ADGBe×1112131415Barre at fret 11AC♯GB♭

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

Notation treble clef

𝄞♯♭

Intervals

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

About this chord

What is an A dominant seventh flat nine chord?

A7♭9 is built from 5 notes: A (the root), C♯ (the 3), E (the 5), G (the ♭7), B♭ (the ♭9). Dark tension that pulls hard towards a minor chord.

Notes
A · C♯ · E · G · B♭
Formula
1 · 3 · 5 · ♭7 · ♭9
Also written
A7(♭9)
Found in
Outside the major and minor keys

Scales that contain A7♭9

Neighbours

Chords close to A7♭9

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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