So I'm trying to learn the Miles Davis version of Stella by Starlight out of the Real Book, from the My Funny Valentine live album. Now I just have a few questions. I noticed that throughout the song he is basically using the Bb major scale or G natural minor. The first chord in the song is E-7b5. Over this chord, the Bb major seems to fit, because Bb is the flatted 5th of the E minor scale. Am I right in saying I could use the Bb major over this E-7b5? Am I also correct in saying that he seems to stay within the Bb major scale throughout the song?