Oi! Phase, polarity...........
Polarity is just a special instance of phase shift; 180 degrees!
Ron Roscoe
-----Original Message-----
From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]] On Behalf Of Jamie Howarth
Sent: Wednesday, May 06, 2015 3:32 PM
To: [log in to unmask]
Subject: Re: [ARSCLIST] Playing Edison Diamond discs
Correct, and I'm talking about phase because the two grooves are never perfectly perpendicular.
Please pardon the misspellings and occassional insane word substitution I'm on an iPhone
> On May 6, 2015, at 3:25 PM, DAVID BURNHAM <[log in to unmask]> wrote:
>
> Actually, Mickey, Pete is correct. What you are describing is polarity reversal, as Michael Biel is usually only to happy to discuss.
>
> Dave
> --------------------------------------------
> On Wed, 5/6/15, Mickey Clark <[log in to unmask]> wrote:
>
> Subject: Re: [ARSCLIST] Playing Edison Diamond discs
> To: [log in to unmask]
> Date: Wednesday, May 6, 2015, 1:43 PM
>
> Pete-Phasing is inverting the
> waveform - no delay temporally-Mickey
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> https://twitter.com/MickeyRClark
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> ----- Original Message -----
> From: "Pete Tinker" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, May 06, 2015 8:51 AM
> Subject: Re: [ARSCLIST] Playing Edison Diamond discs
>
>
>> Please forgive this uneducated question. Much of
> the discussion on this
>> topic has focused on the "phase" of different
> transfers. I'm not a
>> signal processing guy, but to me "phase" involves the
> frequency of the
>> signal, so changing the phase is a temporal shift in
> the signal (a
>> lateral shift along the time axis) by a fraction of
> some wavelength. At
>> times in this discussion, it seems that the intention
> of changing the
>> phase is a reversal of the amplitude of the digital
> signal (mirroring it
>> across the time axis), for which frequency is
> irrelevant.
>>
>> If I have a stereo signal from a hill 'n' dale source,
> it seems the
>> preferred next step is to invert the phase of one
> channel and then
>> combine (add) the two channels prior to any digital
> noise reduction.
>> What is the meaning of "phase" in this context?
>>
>> --
>> *Pete Tinker*
>> West Hills, CA 91307
>> 818-three/four/six-5213
>> 818-six/nine/four-5213 /(cell)/
>
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