Dolby was in the driver's seat. "Surround Sound" was added. Now we had three speakers behind the screen, two more on the left side of the theater, and two on the right. A closely guarded secret about all this is that you hear the correct balance only if you're sitting in the center of the theater. On the left or right side, those speakers tend to dominate.
Sidney LumetThere are no minor decisions in movie making. Each decision will either contribute to a good piece of work or bring the whole movie crashing down around my head many months later.
Sidney Lumet