Guitar · Ninth chord

A9 Ninth

Key: D Major
Medium
Open chord

A9 is the A ninth chord on guitar, made of the notes A · C# · E · G · B.

Position 1 of 4Main

Notes

A
C#
E
G
B

Structure

1
3
5
♭7
9

Sound: Dominant ninth; Rich, funk and jazz
Harmonic function: Dominant; Creates tension that resolves to the tonic.

Harmonic field of D Major

Degree	Chord	Function
I	D	Tonic
ii	Em	Subdominant
iii	F#m	Tonic relative
IV	G	Subdominant
V	A	Dominant
vi	Bm	Tonic relative
vii°	C#dim	Dominant

How to play

1Place your index finger on fret 3 of string 1.
2Place your middle finger on fret 4 of string 5.
3Place your ring finger on fret 5 of string 6.
4Place your pinky on fret 5 of string 4.
5Let strings 3, 2 ring open.
6Strum all the strings.