52578 3AUG89-0257 HELP
RE: iron forest (Re: Msg 52488)
From: EDDIEKUNS To: ARTFLEXSER
Um … I think I came across wrong.
When a DAT cassette is written to, it writes “extra” information outside
the sound tracks. A chip in the DAT deck looks for this info when playing
a cassette and won’t record when playing a tape so encoded. This is my
understanding. Of course, there’s always the subcode on a CD player –
the extra space that isn’t used. But, you’d have to get the subcode to
the system somehow. A system depending on the CD player owner to plug
the subcode into the DAT deck is easily defeated!
I’ll try and find my information source. I thought it was the latest
Stereo Review, but couldn’t find it in there.
Eddie
52594 3AUG89-1842 HELP
RE: iron forest (Re: Msg 52578)
From: ARTFLEXSER To: EDDIEKUNS
Thanks for the additional information. If the intent is to allow only
first-generation DAT copies to be made from a CD, it would seem more
natural to me that the protection code be embedded in the CD subcode,
rather than inserted by the DAT player. The DAT player would then only
need to be able to distinguish between whether a signal it was recording
was being fed to it from a CD or from another DAT player, which should be
easy to label using the DAT subcode. That way you could have protected
and unprotected CDs as well as DAT tapes.
52813 10AUG89-0430 HELP
RE: iron forest (Re: Msg 52594)
From: EDDIEKUNS To: ARTFLEXSER
But if you reply on CD subcode, you have problems. For one, you DEPEND on
the person hooking up a cable from the subcode out of the CD player into
the DAT deck. Also — a very important point — not all CD players HAVE
a subcode out!!! And they haven’t found a way of encoding such informatinon
into the audio tracks that doesn’t mangle the music. I would refuse to
buy any CD that has been tampered with to insert such a code into the audio
tracks!
They would gladly prevent even the first generation copy from CD to DAT if
they could. That way they’d make more money. If you owned and used both,
then you’d have to buy the CD *and* DAT of everything you listen to.