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Originally Posted by UnderTow  It seems to me, judging by this page: EZ Phase that the device can indeed test the absolute polarity of your system by using a test signal on the provided CD and using the hand held device. (Assuming they are not outright lying in the marketing). Nowhere on that page does it say it can test the absolute polarity of a random recording. |
Indeed it doesn't, after I checked. But inasmuch as the item DOES perform that task, I should explain that it's sold as a device to align the polarity of drivers. (Unmentioned also in the literature: some drivers are
intended to be out of phase with the others -- so one must be careful.) In fact it registers the polarity (compressive or rarefactive) of any transient musical signal in acoustic space.
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Have you been using this device on your collection of CDs and LPs and getting 50/50 (random) results and then concluding that CDs (or whatever) must have inverted polarity 50% of the time?
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I have used it, yes, at first only to confrim that the list of particular polarities I published in
The Wood Effect was true. (It was.)
If CDs and LPs are randomly dispersed in polarity, what else can one conclude, other than 50% are inverted from the other 50%? (Neither way, as I hope everyone has realized by now, is "correct" by any definition.)
Note too, the polarity of cuts across the entirety of the disc may vary as well.
Hope that helps.
clark