Inner tracks vs outer tracks

Thanks for the answers. In my opinion, irrespective of the tracking error, which can be minimized with a linear arm, the difference in diameter should have an effect on the sound. We have the same amount of information stored in a shorter span. In my case, my analog system was improving in quality over the years and from a point onwards I began to hear differences as it entered the last two tracks of the album. May be due to better system resolution. Which bothers me a little. I am thinking of buying a linear tracking arm in the future to see if the differences can be minimized.

There is indeed a velocity change with the outer grooves moving faster than innner. This does matter and is why for example 45 sounds better than 33. Its why 30ips tape is better than 15. Its why half-speed mastering works.

It also changes very gradually from the first groove to the last. Should be needless to say, tangential tracking does absolutely nothing to change any of this.

People are notoriously bad and detecting changes that are continuous and gradual and slow. AC power is like this. A lot not only don’t notice power gradually getting cleaner making everything sound better late in the evening, they don’t even believe its possible! This tracking error thing I at least know is happening. Not happy with it. Just silly to try and deny reality. It happens. I don’t hear it. So I don’t care.

Some like millercarbon do not see this as a problem, they are happy with this situation. Others like me have solved the issue by using the UNI-DIN curve which provides a better sound also for the outside tracks - and by using a good system you will hear it!

UNI-DIN is nothing more than another cartridge geometry. The only difference is UNI-DIN is weighted more to having less error at the very end. For records that even go that far. The other alignments are more evenly weighted. If you are sensitive to this- if you can even hear it at all- AND if the last seconds of each side matter so much more than the first 15 minutes, then UNI-DIN might be worth the money.

Oh yeah. Money. Did anyone mention that unlike the other alignments people can download and try for free UNI-DIN is proprietary and requires buying a protractor? No? In other words, this is all marketing malarkey.

This tracking distortion level is changing at each single groove during playing and our brain perhaps can be aware of stand alone 0.5% but a little on the middle of the LP surface the tracking distortion level goes down to 0.106% and 0.105% that not even as a stand alone groove you or any one can detect it.
Our brain goes accustommed to those very low distortions even that can’t detect it so where are the advantages between those differents alignments?

Exactly.

isochronism:

Miller: "There should also be changes as the Earth turn's on it's axis and magma shifts affect local gravity". So the amount of anti-skate adjustment would be dependant upon the turntable's placement orientation in regard to the direction the Earth is spinning? 

No. The clue is in the phrase, "magma shifts affect local gravity." That is a clue to this being a question of gravity not spin. If it was spin then I would have said, "magma shifts affect Earth's spin velocity" or something like that. Gravity. Spin. Two different things. 

In any case its poppycock- or is it? Gravity is a function of mass and so dense magma moving around beneath the crust does indeed affect local gravity. Gravity is what pulls the stylus down into the groove. The stylus being pulled down into the groove is what creates drag. Drag is what affects anti-skate. Therefore logically magma affects anti-skate. Its just a fact. You could look it up. 

Its also a joke. A great big joke. Because while yes indeed all this is true, it also pales in significance to all the other things we can make so much of that turn out in the end to be insignificant. Which was my whole point. This whole thing is like arguing over how many angels can dance on the head of a pin.

Yes. There should also be differences outside to inside due to tracking error. There should also be differences due to stylus drag changes as volume changes affecting anti-skate. Lets see now, if its a uni-pivot there should also be changes pretty much all the time due to everything. But if its a gimbal arm there should be changes due to bearing chatter. There should also be changes as the Earth turns on its axis and magma shifts affect local gravity. 

The true answer is because the record turns at constant RPM, but the circumference decreases as you go in, then the lower surface speed should result in lower bandwidth and lower sound quality.

As with all the other stuff though the operative word is "should". Let me know if it actually does.