Digital Rights Management (DRM) refers to technologies used by music publishers to limit usage of digital music.
Online music stores are forced by the major record labels to use DRM to restrict the usage of music purchased and downloaded online. Typical DRM schemes require subscription fees to continue usage or restrict usage to a specific digital music player or computer.
Online music stores using DRM include iTunes, Napster, Wal-Mart Music and many others. Note that DRM-free music is available from independent music labels in the universal MP3 format at emusic.
When will the music industry wake up and take advantage of digital distribution? Consumers are happy to pay for their downloaded music but then want the freedom to play that music on the various devices that they own (iPod, MP3 player, PDA, cell phone and computer). DRM makes this difficult if not impossible.
For more information on DRM, go to: Wikipedia











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