How can I remove DRM from my iTunes music without transcoding?
Solution 1:
Apple offers a feature called iTunes Plus to upgrade most purchases to a DRM-free version for a small fee. This link will bring you directly to the appropriate section in iTunes to do this.
Solution 2:
With iTunes Match you can re-download them in iTunes Plus quality without DRM protection. And it's just $25 a year, definitely worth if you have more than an album with DRM. http://www.apple.com/icloud/features/