OK, I have a TON of music on my computer with a wide range of formats. I know that mp3's and WMA's will work if I burn them to a CD...but what about these: M4A and AAC. I didn't even know these 2 existed. Will they work if I put them on a CD? And this may be an incredibly stupid question, but.....what about an mp3 player? Are they STRICTLY mp3 players, or will they accept any audio files? I'm pretty much braindead when it comes to this kind of stuff, it's a miracle that I can even burn a CD without any serious injury. Any help is appreciated.