Hi John,

Doesnt analog EQ, by definition,  shift phase? Or are you saying digital EQ 
doesnt shift phase?

Rgds
Tim Gillett


----- Original Message ----- 
From: "John Haley" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, April 16, 2018 10:28 AM
Subject: Re: [ARSCLIST] Variable Reluctance Stereo Cartridges was "High Def 
vinyl?"


> 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.
>
> Best,
> John
>
>
> On Sun, Apr 15, 2018 at 9:51 PM, Paul Stamler <[log in to unmask]> wrote:
>
>> On 4/15/2018 4:02 PM, John Haley wrote:
>>
>>> Mickey,
>>>
>>> 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 
>>> drastically
>>> 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).
>>
>> Peace,
>> Paul
>>
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