If you actually wanted to get technical about it I would say it's in A dorian. I'm pretty sure thats the tonal center. I never said it was in C major, I only said I wrote the first chord as C6 to show the ascending melody which is in the harmony (6-7-root on C). Thats how I would show the way the melody moves against the bass. Especially since the next 2 chords are C major chords. It's alot clearer to me that way, rather than Am, Am/maj7/G#, Am7/G, Am6/F#, whatever. :confused: The second question, I could say the same. How would you explain a Dmaj chord (IV) in A minor? That's an equal accidental in both C major and A minor. It's not in A dorian.