is an SDMI
-compliant digital rights management
scheme by Sony
. It is designed for audio files in ATRAC3
format. The compliant software, eg. Sony SonicStage
, is usually capable of transcoding MP3
files to OpenMG/ATRAC3. The file extensions OpenMG-encrypted files are .omg
There has already been at least one reported case when a security update of Windows broke OpenMG-compliant software. This issue was later resolved.
Sonicstage 3.4 includes an option to remove DRM one's entire media library, allowing unrestricted use. However, this feature is disabled for copies without a license.
The compliant music organization systems, eg. OpenMG Jukebox, work by "checking out" and "checking in" the files to/from portable players, keeping only one copy unlocked in order to hinder proliferation of copies.
Criticisms of OpenMG
The 'checking in' and 'checking out' of files is often cumbersome and risky in comparison with unprotected data. Side effects include user complaints of being locked out of their own original recordings, unable to transfer them to the computer. With the combination of OpenMG with MagicGate
, Sony intends to restrict the files to be only moved instead of copied, artificially emulating the restrictions of physical objects. However, as of the most recent releases of Sonicstage, files can be "checked out" of the library an unlimited number of times to a portable device, without the need to "check in" any of them.
Inability to read 'corrupted' ID3 tags
OpenMG modules also tend to choke on corrupted MP3 ID3
With some Sony portable audio players it is not possible to directly drag and drop the desired tracks to the device's directory structure, but a considerably cumbersome process of using Sony's own or compatible software must be performed.
Non-standard Table Of Contents
OpenMG protection applied to music compact discs
relies on nonstandard disc TOC
. This is somewhat similar to Cactus Data Shield
scheme, without the artificially introduced C2 errors