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From: ken@argus.UUCP (Kenneth Ng)
Newsgroups: sci.electronics
Subject: Re: 3800 Hz notch filter [will] be used on CD masters
Message-ID: <921@argus.UUCP>
Date: Sat, 27-Jun-87 02:20:18 EDT
Article-I.D.: argus.921
Posted: Sat Jun 27 02:20:18 1987
Date-Received: Sun, 28-Jun-87 04:50:00 EDT
References: <598@neoucom.UUCP> <67@sdeggo.UUCP> <1597@ihuxi.ATT.COM>
Organization: NJ Instit. of Tech: TEIES Project
Lines: 29
Keywords: with possible icky results!

In article <1597@ihuxi.ATT.COM>, store2@ihuxi.ATT.COM (Kit Kimes) writes:
> In article <67@sdeggo.UUCP>, dave@sdeggo.UUCP (David L. Smith) writes:
> > How much do you want to bet that 
> > Radio-Electronics has an article "for experimental and educational purposes"
> > on how to do it within a month after they come out?
> Sorry, but the protection circuit will be buried deep in one of the LSI's.
> There will be no way to remove it and even if you could, the notch will
> still be there on the source CD.
> 					Kit Kimes  

It will degrade the quality of the copy, but mixing in a low volume
sound that is notched to match the CBS copycode scheme should bypass
the scheme.  One of the things that bugs me about the copycode scheme
is that for the first time I can re-order songs the way I want to hear
them, and with copycode I can't even do that, even if I bought the
tape.  Also, CBS claims that no normal music is present in the notched
area.  But if there isn't anything there, what does the notch do?  I
myself am willing to bet Radio-Electronics will publish a bypass
mechanism, I may even build one.

... This signature was put in in a way to bypass the 
... bogus artificial line limit on the .signature file.
... Also, by its length it adds fodder to help avoid having
... my followups being bounced due to the restriction on
... followup articles.

Kenneth Ng: Post office: NJIT - CCCC, Newark New Jersey  07102
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