Bromo wrote:
On 6/12/04 12:50 AM, in article fYvyc.13338$eu.8458@attbi_s02, "chung"
wrote:

maxdm wrote:

Well if there is something to be criticized about digital it is the
unnatural high end.
it can be heard in the 'livelyness' of the instruments (cd's will
sound a little flat on the attack of a picked acoustic guitar or on
the transients of percussion instruments)
you can also see this by looking at the output of a digital-to-analog
converter: the waveform gets mangled from say 5 KHz up.
at 10 KHz there is considerable waveform distortion.
this is not an opinion but a fact, that's why high sampling rates
exist.


I'm afraid that you, like a lot of audiophiles, do not understand
digital audio or the sampling theorem.

Waveforms from 5KHz do not get mangled in CD's. In fact, sinewaves up to
20KHz are preserved pristinely in CD's, with the exception of the noise
floor being 93 dB or so down.

Actually, most of the mangling is not sine wave based, but when you get more
complicated waveforms - and the recoding device it he studio has an older
brick wall filter to anti-alias - the phase distortion is apparent as low as
1-2kHz.

Are you confusing a possible defect in an incompetent implementation of
a technology with a defect of a technology?

I guess that could have been highly incompetent implementations that
screw up phase response at 1 or 2 KHz, but it is child's play nowadays
to not do that.

Have you seen phase distortion at 1 KHz from a CD player? Or an ADC?


Sine wave reproduction at 1kHz is not perfect - mostly due to imperfections
in the DAC and usually cheap/poorly executed analog stages.

Please provide examples of how a 1 KHz sinewave is not reproduced
pristinely due to phase distortion.

Most mid range
priced ($300) CD players made from c.1996 on later tend to have better DACs
and decent analog stages.

Please provide examples justifying your claim. Show some test results of
inferior performance from CD players earlier than 1996, compared to
newer ones.