Hmm.. Well, to me anyhow, it mostly depends what audio she's fiddling with. If it's allowed for commercial use, what she's doing isn't illegal. Although, if she's just changing instruments and adds a few notes, that's okay for practice but maybe not for admin, as it'd limit what you would be able to do for the server (since it depends what's available on the internet). If she's using copyrighted audio, then that's another issue entirely.