#1
well i was asked to make a song in a E key, but after a long research a dont have a solid answer, a key is a Scale? i dont understand, i read the whole thread of theory but i dont find the answer.. so my question is.. wtf is a key? how i know whats complement a key? you made the keys or the key are already made? thx in advance
#2
i dont want to try to explain the theory because i will probably explain something wrong, but the chords for the key of E are Emajor, F#minor, G#minor, Amajor, Bmajor, C#minor, and D#diminished.

for any key, find the notes of the major scale (1,2,3,4,5,6,7). In the key of E, these are (E,F#,G#,A,B,C#,D#). the formula for the chords will always follow this pattern:

chord 1=major
2=minor
3=minor
4=major
5=major
6=minor
7=diminished
#4
now, don't feel like you are restricted to these chords and only these chords. its ok to bend the key a bit and add different chords.

there is a lot more to learn on this subject, and there are several lessons on this site that i have found very helpful.

http://www.ultimate-guitar.com/lessons/chords/what_chords_are_in_what_key_and_why.html

http://www.ultimate-guitar.com/lessons/chords/barre_chords.html
#5
Quote by :-D
All the keys are already determined; the key simply represents the tonal center of a piece.

I think that's the best way to define it in a simple manner.

You're not limited to follow a certain progression at all, so don't be confused by guerito's post.
#6
i repeat, "don't feel like you are restricted to these chords and only these chords. its ok to bend the key a bit and add different chords."
#7
Quote by guerito
i repeat, "don't feel like you are restricted to these chords and only these chords. its ok to bend the key a bit and add different chords."

Sorry, I was talking about your original post. I didn't mean to discredit you or anything like that.