Unipivot vs Linear Tracking

Well, I have never come across an article or study which has compared an actual pivot arm with a linear tracker with a given cartridge and how they would measure on a test record compared to each other in a lab setting. This might not be the perfect guide as far as audible performance is concerned, but it would be interesting. If somebody knows of such a study, it would be nice to post it. I wouldn't necessarily regard it is a determinant of final listening quality, but it would be interesting to read. I would imagine that there is an averaging effect based on torsional flexibility in the cartridge stylus/suspension that applies to both tangency and variable azimuth that might make differences between geometries somewhat moot. It seems that theories assume that the cartridge itself is perfectly rigid and the stylus/suspension/generator assembly is always perfect and that you can tell what it is by examining the cartridge housing. This seems to be a very flawed assumption.
The usual caveats about testimonials tend to apply
1. It's better because it's mine
2. It's better, because my buddy has an extreme system and it always sounds good to me, therefore this one thing in his system means it is better than anything else.
3. I have audiophile hearing, so I can actually filter out the effects of systems, cartridges, setups, speakers, preamps, etc. etc. to make reliable judgments about specific elements in the chain, and I can also make judgments based on audiophile memory, even if all of these chain elements are different.
Everybody seems to do this, including me, but it again makes me very skeptical that you can hear arm geometries in the very specific way that a lot of audiophiles and audio critics claim.

Here's a minor "listening exercise" with a pivoted arm in a highly resolving system with excellent soundstaging... Pull out a record that can demonstrate excellent soundstaging (such as the Holst "Savitri" on Argo ZNF 6 or the Stravinsky "Firebird" on Mercury SR 90226 just to name two examples), listen to the overall sonic window as the arm tracks across that perfect tangency point.

In my listening experience (and that of some fellow listening companions), with a pivoted arm, as the stylus tracks across that perfect tangency point the soundstage snaps into sharper focus, everything is suddenly more sharply and clearly defined, more "solid" in presentation. Then, as the stylus moves past this point, the presentation shifts, ever so slightly, to be less solid and less definitive.

Is this a major shift? No. Do most people notice it? No. But once you become acclimated to the results delivered by a well set up Air Tangent, Rockport or Walker linear arm, the phenomenon is more readily noticed. (The Eminent Technology II arm delivers this soundstaging result as well, as I assume would the Kuzma linear arm. The B&O definitely did not as it crab walked across the vinyl.) And, I don't hear it in all pivoted arm systems, only in those where the entire reproduction chain is sufficiently resolving for the shift to be more apparent.

This is part of the experience of linear tracking arms to which Sirspeedy and Mikelavigne refer. That magical moment when everything snaps into focus on a pivoted arm is what a linear tracking arm is delivering across the entire playing surface of the LP.

Try listening for this the next time you have an opportunity with a superb pivoted arm based system playing back a superbly recorded LP with excellent soundstage reproduction.

OTOH, soundstaging is not something that pushes everyone's buttons. It does mine, but it just may not be important for others. In that case, enjoy not having one more parameter of sound reproduction to mess about with.
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Well, my system is quite resolving, and in no way, shape or form can I hear the sound staging on my best record wander into a noticeable superior presentation around the tangency points and out again. I would imagine that there is a threshold effect that requires substantial distortion to begin hearing the difference to begin with, which would be significantly away from the tangent points, and to believe that you can hear the gradual transition as a continuum with the actual point creating a "snap" is really handing it to yourself and your friends.
Sorry, but no "snap" here. I guess I just have retarded hearing.

Cjfrbw,your post definitely smacks of condescending accusations....I think-:)
I'm going to assume you don't mean it,that way...but for the record,as it applies to my experience at a friend's home(who has a superb rig),I and others,have heard the differences between numerous component changes,"around the linear arm",as well as quite a few different "other" arms,and cartridges.Other component changes too.

The "jury",of other 'philes who've heard the system(over the years)absolutely concur with my "opinion".As it relates to "this" arm subject!

The truth is that my friend(and quite a few of "his" pals,whom I know quite well)are "raving fanatics",in the BEST sense!!Meaning not much....."except" that they are in the habit of A/B'ing the things that interest them.They do it alot.

There has been extensive A/B comparisons(at his home) of too many components to mention,but the "one" thing that is a fact "was" the consistant superiority of "that" linear/air bearing arm!...I have no ax to grind,on the subject(and I appologize if you did not mean to be provacative).

One reason I know this about the arm's superiority,is because it's NOT there anymore!...Everyone knows the missing ingredient,when "now" exposed to the "well it just happens to be a damn good system",but not as good as before!
Fortunately,there are more variables to good sound,so it still sounds superb...but NOT the same!

As to my own approach in posting "opinions"...I personally don't like to "word my impressions of musical satisfaction" through my own system,because I just think it a little too easy to infer how satisfied one is,with their own choices(sort of obvious,if you've slaved over a good set-up,and spent serious moola).

That doesn't mean I am anything less than extremely satisfied with the sound,but I believe one loses a little cred if they wax too much about how great their stuff is!

It also doesn't mean folks should not do it!!Many have been at this a long time,and spent a small fortune on the hobby.If they want to be enthusiastic,good for them.

In my case..if I mention that I believe something is "better",it's because it happens to "sound that way"...to ME!

Btw,my "opinion" regarding 12 vs 9.5 inch arms vs linear/air bearing.....

To me,the 12 vs 9.5 inch sonic differences,are a yawn compared to the difference between a really superb linear/air bearing,as it compares to the 12....

Just my opinion.

Best

How would you measure tracking angle from the output signal? Or what does tracking angle distortion sound like?