Propeller Head Plaza: RE: Thank you. But even "going astray", while that does happen, is not the core of my argument. by rick_m Technical and scientific discussion of amps, cables and other topics.

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Posted by rick_m (A ) on September 23, 2007 at 13:09:12

In Reply to: Thank you. But even "going astray", while that does happen, is not the core of my argument. posted by clarkjohnsen on September 23, 2007 at 11:09:23:

I think we are referring to the same thing Clark. By going astray I mean that even though they are recovering the data accurately from the disk that the sound quality of CD players is often dependent upon the media characteristics. That has certainly been my experience and is widely recognized (well, by most folks) and there are plenty of mechanisms to account for it.

However since the test didn't use CD players, they have eliminated this as a variable, whether they believed in it or not. If I understand the test correctly they did a 16/44.1 A/D-D/A pass of the demodulated material from sources with higher sample rates and resolutions and compared the result with that analog input.

Since the outcome was that they were indistinguishable this says a lot to me about how good this process CAN be. If their test was accurate, the 16bit,44KS/s linear CODEC process itself is sufficient, at least for one trip.

As far as the sound of the translation outside of sample rate and resolution goes, as pointed out that would show up as an error term in the tests and since it wasn't recognized was apparently not of significance. This isn't too unlikely, especially a single master clock was probably running the whole shebang.

Perhaps the player problems are worse than we thought. Good job that they are obsolete...

Regards, Rick

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