You’ve heard it before—dun da dun dun dun da dun. First, it was a staple of alt-rock radio. Now, it’s morphed into a rallying cry for sports fans across the globe, a wordless call to arms as ubiquitous as “Welcome to the Jungle” or “Crazy Train” or any number of arena anthems.

Free beer! Free live records! Not-so-free records! For most of today’s music listeners, attaining music is a non-issue. Online stores such as iTunes, online libraries like Grooveshark or Pandora, and various other less legal means have made music all too available over the Internet.