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Re: Charles I have found some links to help you understand HDCD better:

The first half of your post comprises the repetition of meaningless marketing claims. I will not bother to rebut these.

You claim you were unable to find a link to any evidence that supported Christine's claims. I will try to help you here. I already posted that www.archive.org keeps copies of old web pages. Apparently that wasn't enough information for you, so I will be more explicit.

The archived pages that contain technical information concerning the HDCD process can be found at:

http://web.archive.org/web/*/http://www.hdcd.com/partners/proaudio/articles.html

A specific archived web page from October 2004 that contains the now-deleted documents can be found at:

http://web.archive.org/web/20041012195600/http://www.hdcd.com/partners/proaudio/articles.html

The most relevant document that explains the HDCD decoding process can be found at:

http://web.archive.org/web/20020124175704/www.hdcd.com/partners/proaudio/DecoderFAQ.pdf

Additional technical information can be found in the AES pre-print at:

http://web.archive.org/web/20020124220637/www.hdcd.com/partners/proaudio/AES_Paper.pdf

Please read these documents (or any others you care to), and you will find that Christine's claim is untrue. Please remember that Pacific Microsonics was pretty good with misleading marketing claims, so you will need to read carefully to make sure you are not inferring something that isn't actually said. I think that is actually the source of Christine's confusion on this point.

If one adds a qualifier to your closing statement to instead read, "HDCD discs [utilizing "peak extend" and/or "low level extension"] SHOULD use HDCD decoding every time to hear the recording as the engineer intended", then this is accurate. However, HDCD discs recorded without these features enabled receive NO benefit by being played back via an HDCD decoder. All that it will do differently from any other playback circuit is light up the front panel indicator light. As far as I know, short of interviewing the mastering engineer, there is no way for one to know which HDCD discs will benefit from HDCD decoding.


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