Capo 4 chords
Capo on the fourth fret raise the key two whole steps. For example, a song in C major will now be in E major. A capo on the fourth fret will create possibilities to play some chords with easier fingerings in contrast to the otherwise common fingering choices for specific chord. For example, C# can be played with an A shape and F#/Gb can be played with an D shape (see diagrams below).
Chord with capo 4
C#
C#m
F#
F#m
G#m
B
Comments
G# is also possible with an E shape in this capo position.
What happens in capo 4?
Concerning the common open chords, the capo on first fret will change chord as follows:
C > E
Am > C#m
D > F#
E7 > G#7
Gmaj7 > Bmaj7
This is just a few examples.
Which means, among other things, that the key of A, for example, will shift to the key of C# with capo on the fourth fret.
See also: Capo 1 chords | Capo 2 chords | Capo 3 chords