C7 is a dominant seventh, spelled C, E, G and Bb. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is x001, which sits at fret 1, needs no stretch at all, lets 2 strings ring open and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 15.
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.
x001sits at fret 1, needs no stretch at all, lets 2 strings ring open and mutes 1 string5767sits at fret 5 and spans 2 frets3433sits at fret 3 and needs a barre across 4 strings at fret 3x067sits at fret 6, spans 1 fret, lets 1 string ring open and mutes 1 string546xsits at fret 4, spans 2 frets and mutes 1 stringx0013sits at fret 13, needs no stretch at all, lets 2 strings ring open and mutes 1 stringx01213sits at fret 12, spans 1 fret, lets 1 string ring open and mutes 1 string910810sits at fret 8 and spans 2 frets01087sits at fret 7, spans 3 frets and lets 1 string ring open1500xsits at fret 15, needs no stretch at all, lets 2 strings ring open and mutes 1 string90013sits at fret 9, spans 4 frets and lets 2 strings ring open0001sits at fret 1, needs no stretch at all and lets 3 strings ring open
Keys C7 belongs to
C7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.