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General audio topics that don't fit into specific categories.

CD "A" vs CD "B"

The claim is that CD "A" is inverted in polarity re: CD "B". So of course you would not be setting up a trace between the left and right channels of the same CD.

Rather you be setting up the trace between left channel on "A" vs left channel on "B". Yes this would require synch'ing them or perhaps to copy them digitally to adobe audition or something similar. Inverted polarity (180 deg out of phase) is rather easy to see.

I am questioning whether some claiming that something is inverted in polarity is actually measuring theis physically or trying to do it "by ear". The later method is very suspect, especially in this instance.


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