[Soul-Blade]

MP3s and all other music files are never to be uploaded on a playerworld, unless you have the papers which show you to be the original owner, and send those the Unixmad (or in other words, relinquish your ownership of them so that Graalonline cannot be sued).

Of course, because few of us can do that (myself included), he says to upload the files to a website and allow a option for the players to download. As long as the files are not hosted on the graal servers, they can be used.