Guitar · Seventh chord

A7A Seventh

Key: D Major
Easy
Popular
Open chord

A7 is the A seventh chord on guitar, made of the notes A · C# · E · G.

Other positions

Notes

A
C#
E
G

Structure

1
3
5
♭7

Sound: Dominant seventh; Tense, bluesy
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 2 of string 4.
2Place your middle finger on fret 2 of string 2.
3Let strings 5, 3, 1 ring open.
4Don't play string 6.
5Strum from string 5 down.