Our perception of pitch and harmony is dictated by the geometry of our cochlea, the little spiral that does our hearing for us. That's why some musical ideas remain, even after decades, as popular as a cuisine based on steel wool and chlorine. As if a seamstress, tiring of shirts, skirts, pants, had invented a new garment for a body part that simply did not exist. Doesn't the term avant-garde imply that somebody is being led somewhere? It seems if you claim to be a leader you'd occasionally look over your shoulder to see if there was anybody back there.