All About the CD, HDCD, and SACD Audio Disc Formats
CD, HDCD, and SACD are three audio disc formats that provide different levels of music listening quality. Find out what you need to know.
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Why didn't SACD, DVD, and Blu-Ray audio ever put plain old stereo cds out to pasture, with their superior high-resolution quality and surround sound? I don't get it. - Quora
High Fidelity
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