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12.

Unfortunately, due to legal restrictions and technical issues with some common audio formats, Xubuntu cannot play certain audio formats out-of-the-box. While support for certain restricted formats can be added after you have installed Xubuntu, it can be advantageous to convert audio files to a well-supported format. This is especially important if the files have been encoded using some form of <emphasis>Digital Rights Management (DRM)</emphasis> software, as DRM restrictions can render files unplayable in all applications but the one in which they were applied.