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A9 Chord on Guitar

1423

Open

A9 is a dominant ninth chord: a dominant seventh with the ninth added, the funk and blues chord. The open shape uses 4 fingers on 5 strings.

How to play A9, finger by finger

  1. Put your index finger on string 4 at the 2nd fret.
  2. Put your middle finger on string 2 at the 2nd fret.
  3. Put your ring finger on string 1 at the 3rd fret.
  4. Put your pinky finger on string 3 at the 4th fret.
  5. Strum from string 5 down to string 1, and don't play string 6.

More ways to play A9

2fr431
Open, fret 2 from fret 2
2fr431
Open, fret 2 from fret 2
3fr3241
Open, fret 3 from fret 3
4fr3142
Movable, fret 4 from fret 4
5fr3121
Barre, fret 5 from fret 5
6fr2143
Movable, fret 6 from fret 6
9fr3142
Barre, fret 9 from fret 9
11fr2134
Movable, fret 11 from fret 11

Notes in A9

NoteIntervalRole
A1root
C♯3major third
E5fifth
G♭7flat seventh
B9ninth

Formula: 1 – 3 – 5 – ♭7 – 9

Questions about A9

What notes are in A9?

A, C♯, E, G and B. Those are the 1, 3, 5, ♭7, 9 of the chord, counted from A.

Which strings do I strum for A9?

Start on string 5 and strum down to string 1.

What chord does A9 lead to?

Most often D. A9 is the five chord of D, so it pulls strongly back to D.

Often played with A9

Other 9 chords