I used to sell. . . .well, I carried at least, turntables from Nakamichi which had a cool feature where the turntable didn't care where the spindle hole was. Before play it launches a probe arm which plays the final inner ring and then—get this—
physically moves the record laterally itself so rotation is around the true center of that ring regardless of where the hole is! WOW! Um, I mean
lack of audible wow! Check it out. Many people think "Dragon" only means their cassette deck but this was also called Dragon:
There are other causes of wow but this one is a major one and clearly some people can't hear it because I've seen Fremmy post some videos where I can hear it but he obviously must be oblivious to it or else he wouldn't have posted the video!