Based on the Hifi News test record, the first tracking test is the "Tracking Ability 1 (300Hz L+R At +15dB)". Seems on my system a typical LOMC present SLIGHT distortion or a warbling tone on this. Previously a Lyra Delos sailed through it, and of course vintage MMs have no problem. On real music, I test with high peak piano, in which there’s a combo of sibilance and distortion on those quick note peaks. Yuseef Lateefs Eastern Sounds first track has a few of those quick high level piano peaks, and that’s a good test for tracking IMO. My current Aidas has no problem in this regard.