SACD
ⓘ Super Audio CD (SACD) is an optical disc format which provides a higher bit rate than a conventional CD, with improved clarity and dynamic range. Increased storage allows audio to be encoded in multichannel surround, although not all discs offer this feature. There are two types of SACD:
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An SACD disc with one or more Direct Stream Digital (DSD) layers, designed to play on an SACD player only
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A hybrid SACD containing an additional Compact Disc Digital Audio (CDDA) layer that can be played on any standard CD player
This SACD does not include a conventional CDDA layer and can only be played on an SACD compatible player.