[Scott Dorsey]

wrote:
Scott Dorsey wrote: "- show quoted text -
That's the point of pre-emphasis... the higher frequency distortion
components are reduced compared to the signal because you have increased
the amount of high frequency signal before conversion and then decreased
it on playback.

I know you won't agree, but that matches precisely the description of what Dolby NR did for cassette tapes. Only for the cassettes it actually dynamically compressed the highs overemphasized upon transfer to tape.

Compression and equalization are not the same thing.

The cassette recorder already DOES have 70mS or 100mS (depending on whether
you have selected normal or chrome tape) emphasis before Dolby is even turned
on. In the case of the cassette, it's done both to make the noise floor
somewhat flatter and to increase the amount of low end headroom, though.
Not for distortion reduction (although that can be a happy benefit).
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."