So it seems like if you burn the files to a cd with itunes and re-rip the cd (ideally with something like exact audio copy) you can get a drm free version. There might be a way you could write it to an iso with a virtual cd drive with virtual burning capabilities, which it seems like the ‘ultra’ version of daemon tools has. Not sure on a free option, other than pirating daemon tools. There probably is a free alternative though.
That sounds like an insane amount of trouble to go through, so unless you want to do all of that for the experience, just redownload drm-free files with soulseek or something.