Newsgroups: sci.electronics Path: utzoo!henry From: henry@utzoo.uucp (Henry Spencer) Subject: Re: CD's and digital audio (was Why I hate CDs) Message-ID: <1990Mar19.163704.22192@utzoo.uucp> Organization: U of Toronto Zoology References: <1554@redsox.bsw.com> <38844@iuvax.cs.indiana.edu> <2486@rodan.acs.syr.edu> <9204@sdcc6.ucsd.edu> <6296@blake.acs.washington.edu> Date: Mon, 19 Mar 90 16:37:04 GMT In article <6296@blake.acs.washington.edu> wiml@blake.acs.washington.edu (William Lewis) writes: >>3. If you think CD's are bad, DAT has a 45DB NOTCH cut in it at 15KHZ... > >> What on earth... are... you... talking about????? > > I seem to remember this being some sort of bizarre copy protection >scheme -- the DAT will refuse to record unless there are frequencies >in this notch, and commercial stuff will be distributed with those >frequencies cut out. It sounds too stupid to be true... It *was* too stupid to be true. There was such a proposal; it has been scrapped. There will be some *digital* copy protection on DAT tapes, so you can't use consumer DAT gear to make unlimited digital copies (one generation of copies will be okay), but the notch idea to prevent analog copying caused such an uproar that it was abandoned. -- MSDOS, abbrev: Maybe SomeDay | Henry Spencer at U of Toronto Zoology an Operating System. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu