DRM: The Business end of Digital Mediahttp://www.hometheaterfocus.com/blogs/blog/archive/2006/07/13/100559.aspxIn our last look at digital media we covered some of the oldest formats including the ever present MP3 and Apple's AAC . The AAC file is Apple's codec based on the audio/video compression used by MPEG or the Moving Picture Experts Group - version 4. AnotherenCommunityServer 2.1 SP2 (Build: 61129.2)