...sound than the one from actual CDs? Like if you buy the cd and you download the song from a program like ares, the sound is actually better on the one from ares than the one from the cd. Why is that?

I edit every last song on my mp3 player to make sure it doesnt take too long to start or to end. I'm not a pro per say on audacity but I've had quite a bit of work done on there.