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I don't think so, Ron. Real phase shift means along a timeline--out of phase means not time-aligned. Polarity reversal is at the same time. Best, John Haley On Wed, May 6, 2015 at 3:35 PM, Ron Roscoe <[log in to unmask]> wrote: > 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 > > Follow me on Twitter > > https://twitter.com/MickeyRClark > > M.C.Productions Vintage Recordings > > 710 Westminster Ave. West > > > > Penticton BC > > V2A > > 1K8 > > 1-250-462-7881 > > http://mcproductions.ca > > ----- 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)/ > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > http://www.avast.com > > >