🚀 go-pugleaf

Brendan Heading wrote in message ...
>In article <3676A41B.BC468FF2@cabletron.com>, Michael Thomas
><mithomas@cabletron.com> writes
>>I wholly agree here. you need to hear the difference.
>>I have done listening tests with another audio friend who has a burner. We
have
>>two different burners and completely different audio
>>setups,
>>We agreed that there is noticable difference between source and original.
There
>>seems to be a high end rolloff.
>
>If there was any difference between two digital copies (with no analogue
>stage) then high end rolloff is impossible. Random bit errors (which is
>what we are dealing with) could not possibly produce this result.

'tis true. I've heard some theories about how massive bit errors could be
perceived as lost highs. I dunno, number 1, my standard is making copies with
no bit errors at all, and 2, when there are bit errors, I just hear it
sounding like bit errors - subtle (or not-so-subtle) clicks and pops.

>Why not sample the copy into a computer and use Cooledit (freeware) to
>perform a harmonic analysis ?

Obviously, we are talking the kind of high frequency rolloff that meters can't
measure! ;-)

To cut to the chase, there is a multitone one can download from RME's web site
that lets you measure response at about 30 different, well-positioned
frequencies, in a few seconds. CoolEdit won't give you maximum resolution
because the top of the scale is set at 0 dB. But there are competitive
products, like Spectra Lab, that will. In that context, you can check out
http://www.pcavtech.com/soundcareds/baseline and see measurements of frequency
response on the other of 0.001 dB. Even with that kind of accuracy and
resolution, there is just no HF loss in CD copying.


>>I think that high end rolloff may give some the illusion that it now becomes
>>darker and more wholesome sounding (especially on a crappy
>>cd), but in my mind it trashes a good recording.  The image is all wrong.
even a
>>lower output of some intrumentations.
>
>Unless there is an analogue stage, it isn't possible for these kinds of
>artifacts to be introduced by copying a CD to another CD.


Many ways this sort of thing can happen in the analog domain.