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You want an apology?

I am truly sorry that you have such trouble with reading comprehension. I am even more sorry that you persist in arguing points that are factually incorrect.

1) Thanks for the link to the "technical paper on HDCD". Even though Micro$oft deleted it from their website, it still exists in cyberspace courtesy of "The Wayback Machine" at www.archive.org. In the paper "HDCD Decoder FAQ" you will find the following information:

"The HDCD decoder uses an interpolation filter complementary to the anti-alias filters used in the A/D filter switching process."

I know that reading comprehension is not your strong suit (again, I'm sorry about that), but please note that they use the *plural* form when talking about the encoding filters and the *singular* form when describing the decoding filter.

Now it's not quite clear to me how a *single* decoding filter could somehow be "complementary" to *multiple* encoding filters, but that is the kind of marketing fluff that I have encountered from Pacific Microsonics. (NB -- From a technical standpoint I have no beef with HDCD, nor its implementation. I just don't like the approach whereby they intentionally mislead with their marketing. Which by the way, seems to have fooled you quite well.)

2) Thanks for your link to your previous posting. (I missed it by two weeks in my previous search as you had specified "a few months ago". I erroneously thought that a 7-month window would have encompassed "a few months", but I actually should have used an 8-month window.)

Please note however, that your claim that "the max peak level [of the decoded HDCD signal] is under -6dBFS which means the bit is never used" is incorrect. In the first place, there is not some separate 'extra bit' used for "peak extend". In the second place, the max peak level does not tell you one way or the other whether "peak extend" was used during the encoding process. All it tells you is that the signal level never exceeded -6 dBFS during the A/D conversion process, regardless of whether "peak extend" was used or not.

(If you are unclear about this last point, please read the AES preprint from Johnson and Pflaumer also available from The Wayback Machine. Refer especially to Figure 6.)

3) If you think Ayre should design a DVD player using DSP chips designed for surround-sound processors (that will only be available five years after the player has been designed), then I think you may have a more than just an issue with reading comprehension. I really don't know what to tell you, except that maybe you should start your own audio company and build the products the way you think they should be built. Best of luck.

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