On 15/07/2015 16:32, Jim Lesurf wrote:

shows ADC/processing flaws. And a while ago they produced CDs with the
pre-emphasis flag bit 'on' when the audio isn't pre-emphasised. Slip
somewhere when someone 'improved' something.

If you copy it to .wav files, then write them to another CD,
you will probably fix that. Do you have any examples?
Something I might have in my collection?

On the other hand, if you 'rip' a CD with pre-emphasis,
it will probably have 10dB of HF boost.

--
Eiron.