Dover, That Carol Kidd LP in the Linn label is a pretty good "audiophile" recording. Don't damage it on our account.
A few years ago, I was in Tokyo and visited a well-stocked audio emporium. Here they had in one room pretty near all of the most expensive digital equipment in the world, to include Meitner, Accuphase, Esoteric, Linn, and Burmeister. The sales people left me alone to listen to any and all of this gear, using the very same Carol Kidd recording, the CD version. I sat there for a few hours and got a very good feel for the differences and similarities in SOTA digital at that time. (I was not blown away.) On the way out, I noticed that the store had for sale the LP version of the Carol Kidd recording; so I bought it. When I got back home, I was astonished to perceive how much better the LP sounded on my system compared to my memory of the CD, even when the CD had been auditioned on such high end equipment. This is not to brag on my system. This is to say that with all its faults, even with the faults under discussion on these interminable threads, analog still "rules".
Incidentally, I do believe, if memory serves, that Mark Kelly showed that belt creep can occur even with a non-elastic belt. Also, a sophisticated AC re-generator for a 3-phase AC motor does not eliminate cogging, as cogging is formally defined. Such a controller can reduce or eliminate motor vibration and noise, where motor vibration and noise are due to phase anomalies in the AC delivery. "Cogging" can be reduced by the other strategies you cited, however. At least this is how I understand the art, and I am no motor expert.
