[Harry Lavo]

wrote in message
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Harry Lavo wrote:

And you don't think test records that also included frequency response
tests
from 20hz to 20khz had flat, smooth response?

Actually, they don't. Cutter heads have resonance problems that are
similar to cartridges.

Yes, but it is my understanding that has been a solved problem in the
audible frequency band for decades. And I suppose frquencies could be eq'd
before that. In any case, the frequencies were there on the record. Theory
does not supercede practice.