And there is this little jewel from Clark Johnsen's article in Issue 75 of Positive Feedback,
"A corollary finding was that some LPs and most CDs at that time exhibited a fascinatingly anomalous behavior, viz. that tracks or cuts would actually alternate in polarity. Those LPs were mostly from Japan although the affected CDs originated from all over. This came as a revelation: that certain agencies in the industry did know! And had evidently developed automatic means to detect and systematize polarity to produce discs and records that because of the admixture could be enjoyed more or less throughout, on any system of indeterminate but fixed polarity, with no one the wiser to the subterfuge. (This particular claim has been repeatedly challenged, but facts are facts.)"
cheers
"A corollary finding was that some LPs and most CDs at that time exhibited a fascinatingly anomalous behavior, viz. that tracks or cuts would actually alternate in polarity. Those LPs were mostly from Japan although the affected CDs originated from all over. This came as a revelation: that certain agencies in the industry did know! And had evidently developed automatic means to detect and systematize polarity to produce discs and records that because of the admixture could be enjoyed more or less throughout, on any system of indeterminate but fixed polarity, with no one the wiser to the subterfuge. (This particular claim has been repeatedly challenged, but facts are facts.)"
cheers