C#7 is a dominant seventh, spelled C#, E#, G# and B. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is x112, which sits at fret 1, needs a barre across 2 strings at fret 1 and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 13.
Notes and intervals
Note
C#
E#
G#
B
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.
x112sits at fret 1, needs a barre across 2 strings at fret 1 and mutes 1 string6878sits at fret 6 and spans 2 frets4544sits at fret 4 and needs a barre across 4 strings at fret 4657xsits at fret 5, spans 2 frets and mutes 1 string6542sits at fret 2 and spans 4 frets1011911sits at fret 9 and spans 2 fretsx131314sits at fret 13, needs a barre across 2 strings at fret 13 and mutes 1 string101198sits at fret 8 and spans 3 frets10131314sits at fret 10 and spans 4 frets1112sits at fret 1 and needs a barre across 3 strings at fret 16574sits at fret 4 and spans 3 frets6578sits at fret 5 and spans 3 frets
Keys C#7 belongs to
C#7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.