tbg- the industry standard is for things to be in phase and in polarity. it doesn't mean every recording is but the recordings most people prefer flipped aren't one way or another but in between and are preferred one way by a listener.
polarity is the correcting wiring. Don't confuse this with phase. Phase takes place between more than one source, like two microphones. if they are both in polrity, say pin 2 hot and correct they may be slightly out of phase with each other. when you start to correct an already mixed record with an absolute flip , you are usually choosing whatever sounds better, not correcting an absolute polarity issue.
well, the standard for wiring was pin 3 hot for a long time in europe and it was pin 2 hot in the US later. Now it is generally pin 2 hot. Studios tend to, and should pay attention to this meaning that the polarity should be correct from the microphone into the mic pre into the tape machine. After that you are talking about phase relationships which are far more complicated.
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