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Posted

Hi,

 

My setup consists of a DVD 5.1 home theatre system which only allows for optical audio input (only hdmi output for playing dvd's). I have a fat ps3 and my virgin tivo box connected to the home theatre with optical cables. When I'm watching a HD tv channel for example, I get 5.1 surround sound, no problems, all is well. Similarly if I play a dvd or blu-ray in my ps3, then I have 5.1 surround sound.

 

My problem is this: my latest purchase, The Lord of the Rings extended edition on blu-ray has audio in 6.1 HD. When I tried to play the films, I wasn't getting any sound during the movie (the intros were fine, as were the commentary tracks). With some research and experimenting I found that I needed to change my ps3 settings from 'bitstream' to 'pcm direct'. I imagine this is because my home theatre system doesn't support HD audio, so by changing to pcm direct the ps3 will decode the signal and send it in a format that the home theatre can understand. I thought I had solved the problem... however I've since read online that optical cables can only transfer pcm sound in 2.0 stero, not surround sound  :pinch: So even though it is coming out of all four speakers, that is basically just the home theatre splitting the stereo signal to give faux-surround, as it were.

 

So, from what I can gather so far (I'm no expert by any means), if I play a dvd or blu-ray that has 5.1 audio, then I get surround sound. If my blu-ray disc has better (HD) audio, then I in fact the end result is that I can only receive 2.0 stereo sound... in other words the better the audio on the disc, the worse the audio I actually get with  my setup  :cry:

 

The only possible solution (I think) I know so far:

 

Buy a new home theatre system that allows a HDMI input and/or supports HD audio. This should then work on either bitstream (if the home theatre supports hd audio) or pcm direct (the hdmi cable could transfer surround sound).

 

What I'd like to know is if there is any way of getting my blu-ray discs recorded in 6.1 HD audio to give me surround sound with my current setup? I previously assumed that when the ps3 played the blu-ray and realised that I didn't have a 6.1 HD audio setup, that it would default to some kind of 5.1 standard surround sound, which would be fine!  :woot:

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Posted

Some blurays have an audio selection. You may be able to select 5.1 on the movie itself.
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Posted

Select a non-HD audio track on the player if you can. It should be able to downmix TrueHD to DD and DTS-HD MA to lossy DTS. Both formats can be transported over optical cable.

 

Fat PS3s cannot bitstream HD audio tracks, however I don't know if they will bitstream lossy formats. If not, you need a new receiver that has HDMI-in.

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Posted

Some blurays have an audio selection. You may be able to select 5.1 on the movie itself.

This.  You should be able to select a different audio option (non HD audio) from the setup screen or by pressing the AUDIO button on your remote during playback.  There should be a standard dd or dts option as the secondary audio.   

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Posted

It should be able to downmix TrueHD to DD and DTS-HD MA to lossy DTS. Both formats can be transported over optical cable.

 

there's no need for a downmix in this case as truehd includes a 640 kbits lossy core and dts-hd ma includes a 1,5 mbit dts lossy core.

the player should be configured to output only the core of lossless hd audio signals.

 

 -andy-

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