ah, ok. I don't understand what you do have trouble with, though. What makes music what it is? What makes music music do you mean? Officially only 4/4 in major C is music, but I think this is music too:
http://www.youtube.com/watch?v=dRBYHacC-Bo
Or do you mean more like music theory? Like what chords go well with eachother, and are commonly used, and what chords aren't popular? Maybe you should ask Kari, she knows everything about theory, I guess.