What is you tonearm’s Maximum Distortion?

While I do hear some inner groove distortion sometimes, I am grateful to the last track for giving me a bit more listening time per side.

If the numbers in the table published here by optimize are correct, two things pop out at me. First, the distortion figures are below 0.5% or equal to 0.5% in all cases. Given all the other distortions inherent to vinyl reproduction, does anyone here think he can hear the difference between 0.5% and 0.3% distortion? second, there is a dissociation between the magnitude of the tracking angle, error, or at least the maximum magnitude of the tracking angle error and distortion. Isn’t that interesting?

Both you and Raul referenced the same algorithm on Vinyl Engine.  I see where it has a readout for distortion once you plug in the known values for any particular tonearm, but I have no idea how it comes up with distortion %, mathematically.  I guess it uses formulae first promulgated by the gods of alignment, Lofgren and Baerwald. Anyway, sorry I cannot respond to your actual question. My feeling is that distortion has to be measured, not predicted based on angular errors,

That has been a very popular subject here lately.  How are you calculating distortion?