A9 chord on 6-String Guitar – All Fourths

in All Fourths (E-A-D-G-C-F) tuning · Also known as Perfect Fourths

Root

Type

Tuning

Dominant 9

Notes:A · C# · E · G · B

medium

Piano Left hand Right hand

Fingerings (16)

A9 shapes as text

Frets	Fingers	Notes	Difficulty
x 0 2 4 1 2	– – 2 4 1 3	x A E B C# G	medium
5 2 2 6 4 2	3 1 1 4 2 1	A B E C# E G	hard · barre on fret 2
3 4 7 4 x x	1 2 4 3 – –	G C# A B x x	hard
5 4 5 4 4 4	2 1 3 1 1 1	A C# G B E A	easy · barre on fret 4
x 0 5 6 7 6	– – 1 2 4 3	x A G C# G B	medium
7 0 7 6 7 6	2 – 3 1 4 1	B A A C# G B	medium · barre on fret 6
7 0 7 0 7 8	1 – 2 – 3 4	B A A G G C#	medium
9 0 9 0 9 8	2 – 3 – 4 1	C# A B G A C#	medium
9 0 9 0 9 x	1 – 2 – 3 –	C# A B G A x	easy
12 0 11 12 11 11	2 – 1 3 1 1	E A C# G B E	easy · barre on fret 11
5 2 2 0 1 x	4 2 3 – 1 –	A B E G C# x	hard
5 2 5 6 x x	2 1 3 4 – –	A B G C# x x	hard
3 4 x 4 x 4	1 2 – 3 – 4	G C# x B x A	hard
5 4 5 4 4 x	2 1 3 1 1 –	A C# G B E x	easy · barre on fret 4
7 0 5 6 7 x	3 – 1 2 4 –	B A G C# G x	medium
x 0 7 6 7 6	– – 2 1 3 1	x A A C# G B	easy · barre on fret 6

Max fret: 12

Fingerings shown: 16

The A9 chord (Dominant 9) is built from the notes A, C#, E, G, B. Below are playable fingerings for 6-String Guitar – All Fourths generated for your selected tuning, ordered from open-position shapes up the neck. Tap a diagram to hear it, or switch to the piano view to see the same harmony on keys.

How the A9 chord is built

Formula: 1 · 3 · 5 · ♭7 · 9

Degree	Semitones	Note
1	0	A
3	4	C#
5	7	E
♭7	10	G
9	14	B

More A chords

A Am A7 A°A+Amaj7 Am7 A7♯5 A7♭5 A6 Am6 Am7♭5 A°7 Asus2 Asus4 Aadd9 Amaj9 Am9 A5

Other roots

C9 C#9 D9 D#9 E9 F9 F#9 G9 G#9 A#9 B9

See A9 in another tuning

Standard E E-A-D-G-B-E Half Step Down (Eb) D#-G#-C#-F#-A#-D#Drop D D-A-D-G-B-E Open D D-A-D-F#-A-D Open G D-G-D-G-B-D DADGAD (D Modal) D-A-D-G-A-D All Fourths E-A-D-G-C-F

What notes make up the A9 chord?

A9 is a Dominant 9 chord built from the notes A, C#, E, G, B.

How do I read the diagram?

Strings run left to right from the lowest to the first string; the numbers show which finger presses each fret. An ○ marks an open string, an ✕ marks a muted one.