"Jeff Findley" wrote


A guy I work with used to work at a CD plant and from what he understands
from working there, the type of media used to deliver the master to the CD
plant could make some difference. If the media was digital, then the CD's
pressed would be exact digital copies, but if the media was analog, that
meant that what the plant got was going to be an "AAD" CD with the
additional possibility that the CD plant's analog to digital conversion
might not be as good as what could be done by a recording/mixing studio.

SPARS Code
http://en.wikipedia.org/wiki/SPARS_Code

Once the CD's were cut, they'd sample a few and play them in both a "low
end" and a "high end" CD player. The high end CD player would actually
report error detection/correction information and a certain amount of
errors were allowed in the final product, but I think they only allowed
errors which were able to be corrected by the CD player.



Interesting, but not entirely *news*, Jeff - this is why a few of us (with a
higher *anxiety threshold* than some here) don't trouble too much about what
processes (D or A) went into making various LPs and CDs and just get on with
getting the best out of them as an *end product* on our own kit....

(That said, I believe I can see why some of the 'pre digital/ss' stuff
commands the high prices it does from *discerning* collectors...)