C7 is a dominant seventh, spelled C, E, G and Bb. In Standard tuning (E2 A2 D3 G3 B3 E4) the easiest shape is 012010, which sits at fret 1, spans 1 fret and lets 3 strings ring open. 12 positions for it are shown below, from the nut up to fret 14.
Notes and intervals
Note
C
E
G
Bb
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.
012010sits at fret 1, spans 1 fret and lets 3 strings ring open878080sits at fret 7, spans 1 fret and lets 2 strings ring openx35350sits at fret 3, needs a barre across 3 strings at fret 3, lets 1 string ring open and mutes 1 stringx323xxsits at fret 2, spans 1 fret and mutes 3 strings8108980sits at fret 8, needs a barre across 5 strings at fret 8 and lets 1 string ring open878050sits at fret 5, spans 3 frets and lets 2 strings ring openxx100110sits at fret 10, spans 1 fret, lets 2 strings ring open and mutes 2 strings010109110sits at fret 9, spans 2 frets and lets 2 strings ring open013140130sits at fret 13, spans 1 fret and lets 3 strings ring open0131401312sits at fret 12, spans 2 frets and lets 2 strings ring openx151415xxsits at fret 14, spans 1 fret and mutes 3 stringsxx10986sits at fret 6, spans 4 frets and mutes 2 strings
Keys C7 belongs to
C7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.