Yup, it IS indeed possible, and it's legal ;) I got pissed off at the log-in music, even at low detail, so I googled a bit and came up with this program: (MOD EDIT: Link removed - Jake Corsair) Download it, install it, then open it up, select your browser or swiftswitch or whatever you're using, click "mute" at the right, click ok, wait till it's done and you wont hear any sound from runescape or whatsoever again. Thought I'd share it with you guys.