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Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!hp-pcd!hpfcla!hpcnoa!rmd
From: rmd@hpcnoa.UUCP
Newsgroups: net.audio
Subject: Re: High Quality Recordings - (nf)
Message-ID: <3957@hp-pcd.UUCP>
Date: Thu, 12-Jan-84 03:44:41 EST
Article-I.D.: hp-pcd.3957
Posted: Thu Jan 12 03:44:41 1984
Date-Received: Fri, 13-Jan-84 06:42:53 EST
Sender: notes_gateway@hp-pcd.UUCP
Organization: Hewlett-Packard, Fort Collins, CO
Lines: 16

#R:whuxk:-35500:hpcnoa:30200011:000:537
hpcnoa!rmd    Jan  7 13:40:00 1984

I have an all-digital CD with a clearly  audible power line hum recorded
well below the noise  level.  The apparent  volume of this hum waivers a
little now and then in what sounds like discrete  steps -- implying that
2 to 4 bits of  information  are present in this hum signal.  Why is the
noise apparently so much louder than this hum if the hum represents 2 to
4 bits of information?

Also,  why  are  the  gaps  between  tracks  on  some   all-digital  CDs
significantly quieter than the hiss during the music?

Rick Dow
hpfcla!rmd