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Super audio compact disc

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Super audio CD (SACD) is a derivative of the compact disc, with a larger storage capacity that is used to record music at a higher bit-rate.

Although the same physical size as the compact disc SACD uses a different kind of digital audio signal, Direct Strem Digital (DSD). DSD is 1-bit and has a sampling rate of 2,822,400 Hertz. This gives the format a greater dynamic range and wider frequency response[?] than the CD.

SACD can include a include a CD layer so that the disc can be played back on a traditional CD player, but with out the benefits of DSD.

A CD uses PCM digital audio and is 16-bit with a sample rate of 44,100 Hertz.

SACD was developed by Sony

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