You want to make Music Encryption for your own Music Files?
That's not illegal! I have no idea how to do it, but it isn't; maybe Windows Media Encoder could encode your files to a format which is more usable? But to Format your files so only you can read them would involve making a who new Encyrption System.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.