But, suppose hypothetically you had to choose between two versions of the same programme, say a movie, where one had crystal video, but poor sound, and the other vice versa had poor video, but crystal sound, which would you choose to view?
It’s interesting that the information through vision varies depending on the amount of light received (day, night, closed eyes) or the presence of foreground objects in the field of view, but our "audio channel" is always turned on at 100 % receiving waves of data of the surroundings, even from behind the walls. In some way it would seem a more reliable sense that vision; at least it is for the nightime survival of many animals.
At this moment I think that if there was a big degradation I’d choose the movie with the best audio; and the one with best video if the losses were less severe.