It is possible to distinguish "constancy" (rotation at a constant angular velocity) from "accuracy" (rotation at precisely 33.33 rpm) with a Timeline, altho I am no devotee of the Timeline. But it would be a pain in the ass to do so. One simply needs to make markings at regular intervals on the wall being used to observe the laser beam. If the "dot" moves at precisely regular distances in one direction or the other, with each rotation of the platter, then the speed of the table is constant but not accurate (see above for definitions). IMO, constancy is much more important than precise accuracy, as long as one does not perceive pitch distortion. Tbg, Ideally this would be done with stylus down, playing an LP, to account for stylus drag.
I am just not anal enough to do it, I guess.
I am just not anal enough to do it, I guess.

