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Re: [ARSCLIST] CD-R question
on 1/4/08 9:17 PM US/Central, Tom Fine at tflists@xxxxxxxxxxxxxxxxxxx wrote:
> Well, it may well be argued that 80-minute is out of spec with the 1982-ish
> Red Book, but in practice commercial CDs of more than 74 minutes have been
> released on a somewhat frequent basis since at least the late 1980's.
According to my conversations with the matrix department at a large CD
pressing plant, the theoretical maximum time under Red Book standards has
always been just a second or two less than 80:00 (based on geometry specs).
That particular plant did like to group orders for audio CDs greater than
74:15, so they could better assure quality on those discs.
> So, by the time CDR media became available to the masses, any respectable
> player that could read a CDR in the first place should have no more trouble
> with a 80-minute vs. a 74-minute.
No, but maybe it depends on what you mean by 'respectable'. CDRs have less
reflectivity than manufactured CDs; the CDR is governed by the Orange Book
standard. All of this information is readily available at
http://en.wikipedia.org/wiki/CD-R.
My understanding of the standards governing the manufacture of compact discs
is that the licensors of the technology wanted to insure maximum
compatibility with their players. For this reason, CD pressing plants that
violated Red book standards did so at the risk of losing their license to
manufacture CDs, or so I have been told by one plant.
Of course, the CD market has changed quite a bit; I just received two copies
of a replicated audio CD, both of which cause a computer system crash in the
same place because of a large burst of C2 errors. I've never even seen C2
errors before on a manufactured audio CD.
--
Parker Dinkins
MasterDigital Corporation
Audio Restoration + CD Mastering
http://masterdigital.com