Question: is hdcd the same as sacd?
Answer: SACD has 4.7 GB of data on a disc, CD has 700 mb a disc. HDCD is just a different data encoding process for cd that is used to get the equivalent of 20 bits of data on a 16 bit disc to create a higher dynamic range. HDCD discs still only have the 700 mb of data that Cd's do.