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6.1 Disk - 5.1 System

Discussion in 'Blu-ray & DVD Players & Recorders' started by dolph, Feb 12, 2003.

  1. dolph

    dolph
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    My simple question is what happens if you have a 6.1 disk and a 5.1 receiver system?

    Can the system produce 5.1 sound from a 6.1 disk or would it fall over and do nothing?
     
  2. Matt Horne

    Matt Horne
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    It will work fine..

    if its for example DTS ES 6.1 then you would not hear the 6th channel (as all channels are discrete)

    if its Dolby EX for example the 6th channel is matrixed from the 2 rear channels.. so the end result is that it will work fine either way.

    Matt
     
  3. dolph

    dolph
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    What is the 6th channel on DTS? Rear Centre?
     
  4. Matt F

    Matt F
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    Just to build on what the other Matt has said, there are two types of DTS 6.1 soundtracks – DTS-ES (which is “matrixed in” with the normal rear left/right channels) and DTS-ES Discrete (which is a truly separate discrete sixth channel).

    I believe that any discs with DTS-ES Discrete also have a DTS-ES matrixed soundtrack on them so that those without discrete decoding capabilities do no miss out.

    Anyway, going back to the matrixed sixth channel, some believe that this information is hidden away in the rear left/right channels and that you only hear this information with a 6.1 decoder. Wrong – it is not hidden at all and is fully audible through a plain vanilla 5.1 set up (it is replayed equally through the rear left/right channels). In a 6.1 set up the matrixed information is cleverly extracted from the rear left/right channels and replayed through the sixth “surround back” channel via one or two speakers.

    So, in conclusion, with a normal 5.1 set up, you don’t miss out on any of the sound, it just gets replayed along with all the other information in the rear left/right channels.

    Matt.
     
  5. dolph

    dolph
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    Many thanks Matt+Matt
     
  6. NicolasB

    NicolasB
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    I'm not sure how universal this is, but some processors are able to send the surround back channel in a DTS ES Discrete soundtrack equally to the surround left and right speakers.
     
  7. dolph

    dolph
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    So in peoples' opinion would you therefore be better off buying a 6.1 disk, or on a 5.1 system would a 5.1 disk be best?
     
  8. Nike

    Nike
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    Given the same film, you wouldn't normally get a choice.

    You'll get far more enjoyment IMO if you base your decision to buy a dvd on whether the film is actually any good or not.

    As has already been pointed out, you're not 'losing' anything replaying a 6.1 disc on a 5.1 set-up.
     

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