From the picture above, it looks like the left and right speakers are to the sides of the screen, not behind it. Did some theatres have the left/right speakers behind the screen and others to the sides of the screen? When you say "Vincent Price says from the back of the theater, "You shouldn't have done that, my dear." Would'nt that come from the surround channel which would be the speakers on the side walls and back wall of the auditorium? Or, could the surround channel be directed by someone to a specific group of speakers? So, if there are three stems for dialogue. music and effects, can't you mix them for something close to the original? Have the dialog come out of the speaker closest to the actor on the screen? Have the effect sound that you see on or off the screen come from where you see it or where it's supposed to be coming from?