How To Fix Muffled/Poor Quality Audio Using Audacity

Hey, look at that, I'm not dead.

I decided to play around with Audacity and somewhat fix the Stanton Curve soundtrack from "Unstoppable."

Someone may do this wrong, so I want to clarify. This is realistically just an experiment, it is not a canon or professional way of editing audio. Of course, it won't work every time, and sometimes it can make things worse. You definitely shouldn't use it for anything serious.