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DualDisc
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====Sony==== Because Sony had an existing high-resolution audio format, [[Super Audio CD|SACD]], in the marketplace which directly competes with DVD-Audio (see next section), [[Sony Music]], as a general rule, only provided 16-bit, 48 kHz sampled LPCM stereophonic (and sometimes [[Dolby Digital|Dolby Digital Surround]]) sound on the DVD side of their DualDiscs. The sound was compatible with any DVD player; however, it does not provide the higher fidelity and resolution of 24-bit, high sample-rate [[DVD-Audio]]. In addition, several [[SonyBMG]] titles whose regular editions include copy protection programs (such as [[Extended Copy Protection|XCP]] and [[SunnComm]]) did not feature the software on the DualDisc versions.
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