On Mon, 26 Jan 2004 19:23:44 GMT, "Harry Lavo"
wrote:
"Stewart Pinkerton" wrote in message
news:RkVQb.119549$nt4.516264@attbi_s51...
On Sun, 25 Jan 2004 06:43:33 GMT, Codifus
wrote:
snip, not relevant to below
Here's a link to a site comparing DVD-Audio to SACD using a square wave.
Look at how the CD foramt using PCM, jsut falls apart trying to
reproduce the wave, but DVD audio, also using PCM reproduces the square
wave quite admirably;
http://www.smr-home-theatre.org/surr.../page_07.shtml
What does this prove, other than that CD has a restricted bandwidth of
22kHz, which we already knew?
Think about it a minute, Stewart. It shows that DSD/SACD have performance
essentially equal to 192/24 pcm.
In mere bandwidth terms, we already knew that. Did you miss the 'dirty
little secret' of DSD - the *horrific* RF noise and timing uncertainty
revealed by Anderson's comparison?
Yet the only place you can find 192/24 pcm
is on the stereo mix of a few DVD-A's.
So what? What on *earth* has the ability of a system to reproduce
signals from 30kHz upwards to do with *audio*? Remember, despite the
horrifically sloppy text, square waves do not *have* 2nd harmonic
content, only 3rd, 5th, 7th etc.
All DVD-A surround and most front
channels are recorded in 96/24 or even 48/24, which the square waves show
as inferior (essentially a matter of bandwidth).
And of course, the inability of CD to produce 30kHz is hardly relevant
to humans.
So SACD gives you five
channels of near-perfect sound reproduction; DVD-A gives you five channels
of sound reproduction ranging from cd quality to somewhat better than cd
quality (but not as good as SACD or 192/24, the "unobtainium" DVD-A signal.
Which is the superior commercial product?
The one which sells more, but this has nothing to do with the
irrelevance of 30kHz signals to humans. There is as yet *zero* proof
that SACD and 24/192 DVD-A sound audibly difgferent from 16/44, so
this is a mere numbers game, so beloved of marketing men. Of course,
Anderson merely pointed out that. as always, Sony have to cheat when
comparisons are made, because they *know* that their product is
fundamentally inferior.
--
Stewart Pinkerton | Music is Art - Audio is Engineering