Listen to part of a conversation between two students So, one of the things that I really have in trouble understanding is how jazz music developed tobe so different from many other kinds of music. My class notes are terrible. Well what can not you understand from your notes? Uh ... One thing is I copy down the musical training from the blackboard. What did it mean by that? Well most people who become professional musicians to have some kind of formal training inmusic but the first people who play jazz music had almost none. Ok, but so what? does not it just mean that they were not very good musicians? Well, that's not that the early jazz musicians were not good. it's they that play their instrumentdifferently. Let's say you are receiving formal instruction in the trumpet. First you would learn the right way to place your mouth and the right way to use your fingers and right way to blow air andthen you will practice single notes and different combination of notes until you could do thosecorrectly and only after that which your teacher give you a piece of music to play.