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From: jj@alice.UUCP
Newsgroups: net.audio
Subject: Re: Digital Trojan Horse?
Message-ID: <4190@alice.UUCP>
Date: Thu, 22-Aug-85 08:53:21 EDT
Article-I.D.: alice.4190
Posted: Thu Aug 22 08:53:21 1985
Date-Received: Sat, 24-Aug-85 15:24:34 EDT
References: <4189@alice.UUCP>
Organization: New Jersey State Farm for the Terminally Bewildered
Lines: 33

I think it's a Trojan Horse.

The decent analog records I've seen, and ESPECIALLY the direct to disc
records, have significant energy to 50kHz or above, although only
in transients.  

The digital recordings just simply do NOT have anything above 25kHz,
period.  I suspect that the highest sampling frequencies (64kHz), and
the resulting anti-aliasing filters ??25kHz??? establish the 25kHz
limit.

In any case, the argument is seriously suspect because digital recordings are,
by necessity, band-limited, whereas analog recordings are limited only by
the bandwidth of the recording chain, which can be considerably greater.


I have seen some results where pre-amps had absolute fits dealing with
transients with high ultrasonic content (in fact, I used to own one,
I did some work to find out just WHY some of the Crystal Clear records
I owned sounded so crocked on it...).  Needless to say, digital records
don't cause this problem.

The statement is, I believe, on a par with an article I saw a few years
ago in which an author claimed that even PLAYING ONE digital record on
your turntable would permanantly and irrepairably destroy your pre-amp
for any sort of serious listening.  His comments didn't exactly consider the
laws of physics, but he did get himself a considerable amount of press
coverage, and some flaming on net.audio. 
-- 
SUPPORT SECULAR TEDDY-BEAR-ISM.
"I see a dark cloud, On the horizon,..."

(ihnp4/allegra)!alice!jj