Question about Sony Playstation 3 (PS3) Console

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Playstation 3 I have a playstation 3 80GB. I can not get full digital sound from the units optical output when playing DVD's or Blue Ray disks. Have switched, on the menu, to bitstream output, but the unit only puts out PCM sound (not 5.1 or better) Any thoughts?

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First of all, Linear PCM is the best option to choose. PCM (Pulse Code Modulation) is a format for uncompressed raw audio data.

Some 5.1 sets have Dolby ProLogic II for example. The raw PCM output gets spread at your speakers dynamically. Meaning the decoder of your set interprets it the way it thinks is best. For example, if it gets a high frequency tone, it sends it to the center speakers as for human voice has a very high frequency. The center speaker is meant for dialogs.

But when you choose a compressed, encoded format such as Dolby or DTS the channel devidance is already mixed for you for optimal theatre experience.

When you choose DTS or Dolby in the menu of your Blu-ray Disc it will originally output a raw PCM audio stream. The decoder knows how to decode the DTS data out of it when you use the DTS audio track from the movie. The same goes for Dolby. Some movies can output pure PCM, but then most sets use ProLogic II to devide it over the speakers.
It's kinda hard to explain how it works, bottom line is.. there's nothing wrong.

I hope it makes sense to you and your question is answered.



Posted on Jan 23, 2008


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