In article , John R Leddy
wrote:
duly installed the Nyquist de-emphasis plug-in for Audacity, but so far
EAC hasn't identified a CD as having pre-emphasis.

In my experience it is quite rare. Also in my experience many CD players
don't even bother to check for the flag and impliment it.

The orginal Audio CD specs did include an option for 'four channel' halving
the available duration. But so far as I know, no-one ever made such a disc
or a player for them. Audio CD pre-emphasis seems to have gone the same
way. And the flag may appear on occasion purely as an accident during
generation of the CD image for manufacture.

Jim

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