Folka i The Nova Physics Group har gått dypt inn i CD/digitalproblematikken og har kanskje funnet svarene på hvorfor CD låter "mindre enn perfekt".
Etter å ha lest en del av dette så virker det på meg å være et under at tradisjonell CD avspilling kan låte såpass bra som det gjør.
"Within this site, we hope to bring greater clarity to explaining, in
layman's terms, jitter, bit-perfection, and clocking. Traditionalists
assert that CD is "perfect", and no bits are ever lost. Experientialists
challenge this as "Why, then, do 'perfect' reproductions sound so
vastly different!?" It's true that no bits are lost, but they're anything
but 'perfect'. Alternatives DO exist"
If the proper mathematics are applied here (to the polynomial), there is a 99.5% chance of some jitter being
created in every bit read mechanically using ECC and Parity Bits correction
Worth repeating, professional studio software and gear use rereading, and NOT
error correction codes, because of the jitter these codes create.
In short, more & more accurate clocking are baby steps when the most powerful creation of jitter is during the CD READING itself.
So a notably jittered signal is fed to the finest clocks but they cannot repair what they cannot see as the CD has already been read
http://www.novaphysicsgroup.com/CanYouPlayThatFromMemory.html
http://www.novaphysicsgroup.com/ReadUntilRight.html
http://www.novaphysicsgroup.com/ClocksBeDamned.html
http://www.novaphysicsgroup.com/TheWhitePaper.html
Etter å ha lest en del av dette så virker det på meg å være et under at tradisjonell CD avspilling kan låte såpass bra som det gjør.
"Within this site, we hope to bring greater clarity to explaining, in
layman's terms, jitter, bit-perfection, and clocking. Traditionalists
assert that CD is "perfect", and no bits are ever lost. Experientialists
challenge this as "Why, then, do 'perfect' reproductions sound so
vastly different!?" It's true that no bits are lost, but they're anything
but 'perfect'. Alternatives DO exist"
If the proper mathematics are applied here (to the polynomial), there is a 99.5% chance of some jitter being
created in every bit read mechanically using ECC and Parity Bits correction
Worth repeating, professional studio software and gear use rereading, and NOT
error correction codes, because of the jitter these codes create.
In short, more & more accurate clocking are baby steps when the most powerful creation of jitter is during the CD READING itself.
So a notably jittered signal is fed to the finest clocks but they cannot repair what they cannot see as the CD has already been read
http://www.novaphysicsgroup.com/CanYouPlayThatFromMemory.html
http://www.novaphysicsgroup.com/ReadUntilRight.html
http://www.novaphysicsgroup.com/ClocksBeDamned.html
http://www.novaphysicsgroup.com/TheWhitePaper.html