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To listen to more of Walter Murch’s stories, go to the playlist: • Walter Murch (Film-maker)
Walter Scott Murch (b. 1943) is widely recognised as one of the leading authorities in the field of film editing, as well as one of the few film editors equally active in both picture and sound. [Listener: Christopher Sykes; date recorded: 2016]
TRANSCRIPT:: One of the things that we found that we had to confront in mixing 'Apocalypse Now' was this question of how much information to give the audience in terms of the... what could appear on the various channels. The nature of film is that you are sitting in a theatre or your home watching a screen so your attention is focused in a forward direction. What a three-dimensional soundtrack like 5.1 or Dolby's Atmos now, which is 67.1 [sic - it is 62.2]. What they tried to do, with varying levels of success, is fold the sound into the total space of the room.
And what we found, since we were doing this for the first time, was that certain things worked very well and did not complicate the issue at all, like crickets. If you had a cricket track of night-time insects, you could spread this sound over the whole theatre and there would be... It would sound good and there would be no problem with this. This would not present a conceptual problem. What we did find created a problem was any time we tried to move the dialogue from the centre speaker, even to the left and right speakers, let alone something in the surrounds.
And so this became one of the rules of our road, which is, with very few exceptions, all of the dialogue is coming out of the centre speaker. Which is a paradox or it presented us with a paradox because the dialogue is coming out of the centre speaker and yet you believe that that person over on the left hand side of the screen is saying those words. And that sound effects like cars and boats and helicopters and other things are, in fact, moving around the screen. But dialogue is... seems to want to come out of the centre. And if we would, as an experiment, if we would move it to the other speakers, it... there was a conceptual funniness there. It was complicated by the fact that, no matter how hard you tried, the coloration of the centre speaker would be different than the left speaker and different than the right speaker in very subtle ways, but our ear is very finely tuned to picking up those subtleties. So, if you took a voice and moved it from the centre to the right, it would not only move in space but its coloration would change. It would have a different kind of a quality to it. And the same thing moving in the other direction. And that would be amplified if you moved it into the surrounds.
Now we did occasionally put intelligible dialogue in the surrounds but only in the midst of complete chaos. In other words, at the Playboy Bunny concert in 'Apocalypse Now', when everything is breaking loose and people are jumping from the auditorium onto the stage and the helicopter is trying to escape, there are a few words that creep intentionally into the surrounds. But we would only do that under that kind of condition.