I was just wondering when i was playing it yesterday, could someone explain the theory behind the Guitar/Keyboard Harmony at the end of in the presence of enemies? I know the first half of the guitar is all from the C major scale, but after that I'm lost. Anyway, an explanation would be much appreciated. Thanks!
It starts out in C major and then changes to an A harmonic minor scale ( A B C D E F G#) and then to a Bb lydian scale (Bb C D E F G A, same notes as F major)