Source: http://www.drmare.com/convert-itunes-video/extract-audio-from-itunes-m4v.html iTunes movies are combined with FairPlay DRM(Digital Rights Managemet) Protection, making it difficult to edit. Check this article on how to use a third party software DRmare M4V Converter to remove DRM and extract the audio M4A from iTunes videos. It supports to
extract M4A, MP3, AAC, AC3, OGG, WAV, WMA, AIFF, ALAC, FLAC, M4R, M4B etc.
