Quote Originally Posted by MARK EG
i realise that you can record it back in through a sound card but i just want to know if there's a way to make sure you can't copy an mp3 inside the computer.

encryption for sure, but what program does this??? it's not really an issue for me that someone will eventually crack the encryption, but i'd just like to know what that encrytion could be and how ot go about it.
Should cover all bases...

http://en.wikipedia.org/wiki/Digital_rights_management