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RE: Comparison of CD, SHM-CD, and SACD playback

"But copying onto a CDR affects the sound!"

Actually, that was the point of doing the copying. If copying couldn't affect the sound then the test couldn't add any value.

If copying results in two CD-R's that sound the same as each other this constitutes some evidence that the bits burned onto the CD-R are the same. If it results in two CD-Rs that sound different, then this constitutes (weaker) evidence that the bits are different. (The evidence is weaker because it could be that the burning process gave different degrees of jitter, and whether this is true or not would depend on the design of the copying process. Or the burning process could be inconsistent in quality even when making multiple copies of the same disc.) Of course using a Digital Audio Workstation as I suggested in my first post is much more definitive as to whether the bits are the same. But unless one already has a computer with an Internet connection to download free trial software, it does cost more than two blank CD-R's. :-)

Perhaps I have missed some aspect of the sonic influence of CD-R's on sound. I am not experienced with their real-time interactions with transports because I never play any disc, CD or CD-R, in real-time. I only play out of RAM memory rips previously made to hard drive.

Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar

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