[The Wrap]

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The film makes wonderful use of 3D to create the space in which the action takes place, and obviously sound is a large part of creating that immersive environment.

Oh, absolutely. I’ve always said that we’ve been mixing in 3D for years. We’ve always had surround speakers. But this was the first 3D film that I’ve worked on.

Did your process change because of the 3D?

We didn’t actually mix with 3D glasses or anything like that. I screened the film before we started in 3D, so I knew what to expect. And later on in the process, when we had something together, we went back and screened it again in 3D and made some adjustments. It was a lot of fun.

I’d imagine that the Dolby 7.1 surround format helped with creating the 3D environment.

Yes, it did. Particularly in that nightmare train sequence. The close-up of the locomotive, the wheels, the pistons – we were able to pan those things very effectively to the side speakers without having it overwhelm anything from the back. That also helped in being able to work with music. It was the first time I used the 7.1, but I really liked it.  …

Read the full story here: http://www.reuters.com/article/2012/02/08/idUS250163487220120208