A7 is a dominant seventh, spelled A, C#, E and G. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x22022, which sits at fret 2, needs no stretch at all, lets 1 string ring open and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 14.
Notes and intervals
Note
A
C#
E
G
Interval
1P
3M
5P
7m
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
x22022sits at fret 2, needs no stretch at all, lets 1 string ring open and mutes 1 string705655sits at fret 5, needs a barre across 4 strings at fret 5 and lets 1 string ring open7076xxsits at fret 6, spans 1 fret, lets 1 string ring open and mutes 2 stringsx141401414sits at fret 14, needs no stretch at all, lets 1 string ring open and mutes 1 string1101101011sits at fret 10, spans 1 fret and lets 2 strings ring openx14141214xsits at fret 12, spans 2 frets and mutes 2 stringsx01191011sits at fret 9, spans 2 frets, lets 1 string ring open and mutes 1 stringx141101414sits at fret 11, spans 3 frets, lets 1 string ring open and mutes 1 string7970811sits at fret 7, needs a barre across 3 strings at fret 7 and lets 1 string ring openx2202xsits at fret 2, needs no stretch at all, lets 1 string ring open and mutes 2 stringsx02222sits at fret 2, needs a barre across 4 strings at fret 2, lets 1 string ring open and mutes 1 stringx0222xsits at fret 2, needs a barre across 3 strings at fret 2, lets 1 string ring open and mutes 2 strings
Keys A7 belongs to
A7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.