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Does it ever!

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> On May 7, 2015, at 11:48 AM, Tom Fine <[log in to unmask]> wrote:
> 
> This topic as it relates to both grooved media playback and tape azimuth alignment BEGS for a ARSC Journal article, written in as plain English for non-math majors as is possible!
> 
> -- Tom Fine
> 
> ----- Original Message ----- From: "Richard L. Hess" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, May 07, 2015 11:44 AM
> Subject: Re: [ARSCLIST] Phase vs. Polarity (was Playing Edison Diamond discs)
> 
> 
>> Jamie,
>> 
>> You are not being a pain in the ass. I alluded to the complex adjustments of the cartridge that Doug Pomeroy has explained so well at other times/places.
>> 
>> My goal is for everyone to understand that a polarity flip/inversion/reversal is not the same thing as a phase shift.
>> 
>> The M/S transform involves polarity inversion and summing. Yes, there may be phase errors at the higher frequencies introduced (mostly by) designed-in capacitance that was intended to maintain unconditional circuit stability.
>> 
>> I have done far more research and experimentation on summing dual-mono tape playback to true mono. The theoretical goal there is to properly adjust the azimuth to minimize single-channel high-frequency combing roll-offs. Once that is done, then adjusting the inter-channel delay using an outboard processor finishes the job.
>> 
>> In reality, it is not easy (or even possible on program material) to adjust azimuth to a single channel by ear. The Nakamichi Dragon cassette players will do that with some program material as the inner (right) track heads are split and the system compares one half of the right channel to the other half of the right channel. This defines the playback head, in reality, as a six-track head.
>> 
>> In most instances, with well-designed and well-manufactured heads like those from Nakamichi in the Dragons and even the MR-1s, proper single-channel azimuth will occur close to the point of time-alignment between the two channels (assuming again a mono (single track) recording). So it seems OK to use that to make the mechanical alignment.
>>