#1
Hey,

I'm awful with music theory so I was trying to practice and bought a key book.

I've noticed that the same chords have different diagrams depending on the key that they are in, for instance it shows a C in Cmaj is X32010, however a C in Gmaj is X3555X.

Why is this??
Last edited by AmyL27 at Jun 14, 2016,
#2
They might be trying to show you easy fingerings for chord progressions.

A C chord is a C chord regardless of the key you're in; the only thing that really changes with the key is the likelihood of using a C chord.
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#3
A standard C chord is comprised of the root, the 3rd, and 5th of the chord.


C---D---E---F--G--A--B
1---2---3---4--5--6--7


C, E, G


Now - if you fret the notes for the chords on guitar


e-------0-e------3-c------
B-------1-c------5-e----
G-------0-g------5-c-----
D-------2-e------5-g------
A-------3-c------3-c----
E-------0-e-----x-x-------


Same notes, same voicing, different place on the neck.
Real knowledge is to know the extent of one's ignorance - Confucius
#4
Probably depends on context, some voicings will work better with different sets of chords.