A is a major, spelled A, C# and E. In DADGAD tuning (D2 A2 D3 G3 A3 D4) the easiest shape is x02242, which sits at fret 2, needs a barre across 4 strings at fret 2, lets 1 string ring open and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 11.
Notes and intervals
Note
A
C#
E
Interval
1P
3M
5P
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.
x02242sits at fret 2, needs a barre across 4 strings at fret 2, lets 1 string ring open and mutes 1 stringx07677sits at fret 6, spans 1 fret, lets 1 string ring open and mutes 1 stringx0119011sits at fret 9, spans 2 frets, lets 2 strings ring open and mutes 1 stringx07647sits at fret 4, spans 3 frets, lets 1 string ring open and mutes 1 stringx01114014sits at fret 11, spans 3 frets, lets 2 strings ring open and mutes 1 string70119011sits at fret 7, spans 4 frets and lets 2 strings ring open70767xsits at fret 6, spans 1 fret, lets 1 string ring open and mutes 1 string77760xsits at fret 6, spans 1 fret, lets 1 string ring open and mutes 1 stringx0224xsits at fret 2, needs a barre across 2 strings at fret 2, lets 1 string ring open and mutes 2 stringsx0767xsits at fret 6, spans 1 fret, lets 1 string ring open and mutes 2 strings707607sits at fret 6, spans 1 fret and lets 2 strings ring openxx7677sits at fret 6, spans 1 fret and mutes 2 strings
Keys A belongs to
A is diatonic to 24 of the 96 keys this app knows, playing a different role in each.