A friend is writing a song that begins with the following chord progression: Dmaj7-A-Esus4-E, and then repeats. I changed it to this (just trying things out): Dmaj7-Amaj7-A6-Esus4-E. The two A chords get half the number of beats as before to keep up with the melody. Anyway, my question is this: What the heck key is it in? At first I assumed it was D, just because that's where it starts, but now it's starting to feel like it's in E. Can anyone help?
I just wanted to thank everyone for this discussion. I'm very glad to have found this site. It looks like an invaluable resource for anyone interested in music at all.
I'm a complete newb here so I don't know what the protocol is, but I'm going to mark my question as answered (if I can figure out how to do that), even though the answer isn't definitive. This discussion will lead me in directions I've never taken, and that's more than enough to qualify as an answer for me.
Again, thanks to everyone.