Hi leapfrog, thank you for your suggestion.
We're going to post here after a decision has been taken
GamersHood has decided not to install a music player for the moment.
Uploading mp3 files would put an additional strain on the server, so this won't be possible anyway.
Personal/customized sounds (like you said for visitor messages etc.) are not possible at the time being. Maybe there will be future developments that will allow customized sounds.