On 4/15/2018 9:28 PM, John Haley wrote:
> Yes, Paul, but after resampling it to get it to the correct speed, you
> have abandoned the analog world which is the best place to apply the
> phono-EQ's de-emphasis without phase shifting--i.e., it is best to
> apply the right curve during analog playback, before digitizing.
My experience is that applying the de-emphasis in the analog and digital
world sounds the same (and the filters in, at least, Audition have the
same phase characteristics as analog filters), but that recording flat
allows you to apply click-reduction (e.g., iZotope Rx) with fewer
artifacts. YMMV, of course.
> On Sun, Apr 15, 2018 at 9:51 PM, Paul Stamler <[log in to unmask]
> <mailto:[log in to unmask]>> wrote:
> On 4/15/2018 4:02 PM, John Haley wrote:
> There is a real issue with dubbing 78's (or any other recording)
> at a speed
> other than what it was intended to be played back at. You are
> changing the frequencies of the recording when you play it at
> the wrong
> speed, which will totally screw up the intended phono-EQ
> decoding, which is
> keyed into the original frequencies.
> [much more good stuff snipped]
> If you dub the disc using a flat preamp with no EQ at 33.33 rpm, you
> can then resample it to an equivalent speed of 78.26, 76.6 or 80 rpm
> as needed. (Audition does his well.) Once it's at the right
> equivalent speed, you can add de-emphasis at the appropriate
> frequencies. This offers, for example, a way to get the good
> tracking of a Grado 78 cartridge, while minimizing the infamous
> "Grado wobble" -- there will be fewer things to excite it at 33.33
> rpm than at 78 rpm (or a similarly high speed).
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