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From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: NeXT Dimension as descrambler
Message-ID: <1990Oct2.162126.22928@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <443@kaos.MATH.UCLA.EDU> <51700@brunix.UUCP>
Date: Tue, 2 Oct 90 16:21:26 GMT

In article <51700@brunix.UUCP> cgy@cs.brown.edu (Curtis Yarvin) writes:
>Or, just as tantalizing... since the NeXT has 16-bit audio capability, it
>could serve just as easily as a "black box" for DAT.  You could read in the
>music, add the "black frequency" that is masked out for DAT copy-protection,
>and write it back to another tape...

The "black frequency" scheme was decisively shot down and is no longer
planned.  DAT copy-protection is now strictly *digital* copy protection,
with (oversimplifying slightly) a do-not-copy bit in the digital bit
stream that other digital recorders will respect.  Once the bits get
turned into an analog signal, they are clean.
-- 
Imagine life with OS/360 the standard  | Henry Spencer at U of Toronto Zoology
operating system.  Now think about X.  |  henry@zoo.toronto.edu   utzoo!henry