Hello all, Chords in A major key are: A Bm C#m D E F#m G#dim But I have listened to songs which contain all these chords but in lieu of C#m it uses C# So questions are: 1. Will I say this song is on Key-A or something else? 2. If it qualifies on Key-A then why it has deviation from C#m? 3. Are there any rules which govern deviation of one or more chords from a particualr Key? 4. If such deviations are permitted then whats the use of Key, one can pick any combination that sounds good? Whenever I go deep in theory, I come with only questions:annoyed: And lack of answers fade my interest in theory: Please help!!!