Well, technically speaking, you can do any of the courses as long as you know the things that were in Music 2. Music 1 was the only course offered at our school, and I went through this same problem when I started searching for uni courses, and my career advisor (and the career advisor at Kings) both said to me that I am more than capable of doing any music course, even if I didn't do Music 2. It's only ASSUMED knowledge ... They don't refuse entry if you haven't, they just ASSUME you know what they are talking about.