M4P is a copyright protected iTunes file format of "protected AAC". It's a file format of bought music from Apple iTunes Store that can be listened to only by the iTunes compatible players like iPod.If you purchase audio from iTunes Store, you actually get DRM protected audio (in protected AAC or M4P format), which you will definitely not be able to enjoy on MP3 players as well as other non-Apple mobile players. You can't directly transfer the M4P files to Zune, PSP, BlackBerry and Android ph...

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