What is meant when a movie says Pro Logic II?

Discussion in 'Beginners, General Questions' started by Ken Burkstrum, Mar 9, 2006.

  1. Ken Burkstrum

    Ken Burkstrum Stunt Coordinator

    Dec 19, 2003
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    I never really did figure this out. I've heard people use the terms "mixed in Dolby Pro Logic" several times and I've seen it in the credits of some movies. I know Pro Logic II takes a Stereo mix and simulates 5.1, but I'm uncertain what mixing in Pro Logic II entails....
  2. Jeff Gatie

    Jeff Gatie Lead Actor

    Aug 19, 2002
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    Pro-Logic (not II) is the original Dolby Surround format. It is mastered by taking traditional 2-channel stereo and creating a center and rear channel (the 2 rear surrounds are mono - both put out the same sound) using analog audio tricks, specifically called matrixing. A Pro-Logic track has to be originally mixed as a Pro-Logic track for the surround to show up in the home/theater. Most TV surround and pre-Dolby Digital theater surround is/was Pro-Logic.

    Pro-Logic II is a technique built into HT receivers/processors to simulate surround from a 2 channel source and to accentuate Pro-Logic sources. Rather than being something that is in the original mix, Pro-Logic II is something that is applied by the processor in the home to simulate or accent the original mix.

    For more info, you can read Dolby's website.

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