Thankyou Youngbull, nice post.
This is a pretty misunderstood aspect of our brains L/R cognition.
So far nobody has taken into account the L and R handedness of the brain. What the composer intended for each hemisphere of the brain will indeed be "heard" by our brain (irregardless of our conscious deciphering) differently according to which hemisphere receives which intended stereoscopic band. Your R handed "logical" hemisphere will hear/interpret a L handed "creative" track differently and vice versa.
Obviously as the posts so far imply it is extremely subtle so the only way I can foresee out of the turgid miasma is to conduct further studies with partially deaf people AND Pink Floyd.....
My guess is that bass is obviously logical so ergo R and solo's are creative and L?????
Don't believe me? For instance the brains hemispheres are so subtle, they even affect smell.
www.medicalnewstoday.com/articles/267236