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RE: In other words, you have no idea.

“The only valid point in your whole post is brick-walled CD - and that concern goes away, if one deals with hi-rez files via computer playback.”

If you mean capturing and reproducing sounds that exist in music or environmental sound, then you profoundly under estimate how hard it is to both capture and reproduce those sounds and that in the presence of other sound lower in pitch are easily masked masked.

http://www.minidisc.org/MaskingPaper.html

For example, what loudspeaker transducer do you know of that can cover 50KHz or higher and what sensitivity is it relative to the speakers below? What microphone has both a low enough noise floor for hifi and response that high?

I record in the 24/96 format because of the noise floor and uncompressed recordings but what one can say is that if anything comes out of a CD player above about 22KHz, it not part of the recorded signal.

Also, I didn’t say you can’t hear above 20KHz, I said it had to be loud enough to be audible, just like low frequency sound (see link).



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