To unprotect m4p audio files using iTunes Match
I have been clearing up some music files uploading them to Google Play and discovered some were m4p protected files. As this is an Apple format they must have been purchased from iTunes but they have not been "cleansed" by uploading/matching on iTunes Match and downloading to my hard disc. Surely there is an error here. How can I get "clean" copies? I am using a PC btw although we have 2 ipads & an ipod.