A7 is a dominant seventh, spelled A, C#, E and G. In DADGAD tuning (D2 A2 D3 G3 A3 D4) the easiest shape is x0204x, which sits at fret 2, spans 2 frets, lets 2 strings ring open and mutes 2 strings. 12 positions for it are shown below, from the nut up to fret 11.
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.
x0204xsits at fret 2, spans 2 frets, lets 2 strings ring open and mutes 2 stringsx05045sits at fret 4, spans 1 fret, lets 2 strings ring open and mutes 1 string705675sits at fret 5, needs a barre across 4 strings at fret 5 and lets 1 string ring openx01191011sits at fret 9, spans 2 frets, lets 1 string ring open and mutes 1 stringx01101011sits at fret 10, spans 1 fret, lets 2 strings ring open and mutes 1 stringx01100xsits at fret 11, needs no stretch at all, lets 3 strings ring open and mutes 2 strings7770011sits at fret 7, needs a barre across 3 strings at fret 7 and lets 2 strings ring openx076107sits at fret 6, spans 4 frets, lets 1 string ring open and mutes 1 stringx02042sits at fret 2, spans 2 frets, lets 2 strings ring open and mutes 1 stringx0504xsits at fret 4, spans 1 fret, lets 2 strings ring open and mutes 2 stringsx05677sits at fret 5, spans 2 frets, lets 1 string ring open and mutes 1 stringx07675sits at fret 5, spans 2 frets, lets 1 string ring open and mutes 1 string
Keys A7 belongs to
A7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.