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secure audio path (SAP)

Microsoft's Secure AudioPath (SAP) copy protection uses noise to interfere with audio data in such a way that the files can only be played back by a particular computer

. When played on other computers, playback is impaired; when played on the designated computer, SAP copy protection detects the interfering signals and filters them out in thesound card

. The Protected Media Path (PMP) method evolved from Secure Audio Path copy protection.

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Englisch: secure audio path - SAP
Updated at: 28.01.2013
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