In sound creation, as opposed to reproduction, there aren’t any rules. Whether or not that matters depends on whether or not you like the sound. In this case as long as the common audio is “correlated” (we won’t get into exactly what that means here but as a rule of thumb, if the bleed is from far away it is likely to be uncorrelated) then if a phase shift is created on one route that common audio has to your ears but not on the others then it can cause an unintended change in the sound. A great example is multiple mics on the same source whether these are mics which “belong” together like mics on a drum kit or guitar cabinet, or spill between players in the same room such as vocal bleed onto an acoustic guitar mic. This isn’t the case with tracks which do contain information which is common to each other. Phase shift in the case of overdubs where there is no common information between one track and another usually isn’t an issue. If however you wire one of a pair of speakers out of phase you’re much more likely to notice as we are sensitive to a difference in phase between two related (or “correlated” signals). If you wire a mono speaker the wrong way round so that the driver moves in when it should be moving out you’re unlikely to notice.
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