question about PS3/BD player Blu-ray playback of DTS audio

[mmace]

can someone explain this for me please?

I have a basic amp which accepts Dolby Digital 5.1
I have my PS3 set to output upto Dolby Digital 5.1 maximum
My brother has a decent amp which accepts DTS
He has his PS3 set up to output DTS

If I play Casino Royale (just an example) without going to any audio options on the disc it plays in Dolby Digital on my amp
If my brother plays the same disc without altering anything it plays in DTS
If I play another disc I have which only has a DTS audio track it plays in stereo
If my brother plays the disc it plays in DTS

why does casino royale play in DD on mine and in DTS on my borthers?
Does the PS3 automatically choose the audio track or does it convert DTS for me on the fly?
If it converts it for me, why doesn't it do it with the other disc?

thanks in advance

[Sharktooth]

Just FYI the PS3 does not support DTS-HD decoding.

[lexor]

can someone explain this for me please?

I have a basic amp which accepts Dolby Digital 5.1
I have my PS3 set to output upto Dolby Digital 5.1 maximum
My brother has a decent amp which accepts DTS
He has his PS3 set up to output DTS



why does casino royale play in DD on mine and in DTS on my borthers?
You said it yourself (I bolded it in quote above), you set yours to output DD and your brother DTS, I don't see why you are surprised that you get DD and your brother gets DTS.


Does the PS3 automatically choose the audio track or does it convert DTS for me on the fly?
When a bunch of audio tracks are present many players (including PS3) tend to default to DD. If DD isn't there it will try to pass through DTS. If it can't (i.e. receiver can't accept it), PS3 will decode DTS to PCM and downmix channels, which now have to be 2 channel since that's max that can be sent over Coax or Optical (in PCM format). As far as I can tell from your info, your receiver doesn't support DTS, so decode to PCM + downmix to 2ch is what's happening.


If it converts it for me, why doesn't it do it with the other disc?

Because other discs have audio in a format that your receiver supports?

Just FYI the PS3 does not support DTS-HD decoding.
A slight correction. There are 2 things in DTS-HD umbrella: Master Audio (lossless) and High Resolution (lossy but with more channels and higher bitrate). PS3 has zilch support for Master Audio, but it can extract Core DTS track from a High Resolution track (Core DTS is the good old DTS which we have on DVD).

[mmace]

You said it yourself (I bolded it in quote above), you set yours to output DD and your brother DTS, I don't see why you are surprised that you get DD and your brother gets DTS.cheers for your answers, I am not expecting DTS on mine, I was just wondering if the PS3 chooses which audio track to play, so the video I have with just DTS, if I add DD as well then his should play the DTS and mine should play the DD, is that correct?

[lexor]

cheers for your answers, I am not expecting DTS on mine, I was just wondering if the PS3 chooses which audio track to play, so the video I have with just DTS, if I add DD as well then his should play the DTS and mine should play the DD, is that correct?

I don't understand what you mean by add DD. You mean you will mux another audio stream into some container, so you'll have some Video stream + DTS audio + DD audio? Then yes, if you select DD track you'll have that play and your brother can select DTS (it won't auto select DTS for him, he has to choose the track). All this assuming you are working with a container that plays nice with PS3.

[mmace]

I don't understand what you mean by add DD. You mean you will mux another audio stream into some container, so you'll have some Video stream + DTS audio + DD audio? Then yes, if you select DD track you'll have that play and your brother can select DTS (it won't auto select DTS for him, he has to choose the track). All this assuming you are working with a container that plays nice with PS3.yes, I'm talking about making a BDMV with 2 audio streams (I know how to do it).
You say it won't auto select, that's what I was getting at with the casino royale example
we both put the disc in and play the movie without touching the audio settings of the disc, his plays DTS and mine outputs DD5.1.
This is what's confused me, I've been told it doesn't auto select by someone else too yet if I ONLY have DTS audio stream mine plays in stereo but if we play casino royale (just an example, could be any film) i get 5.1

[lexor]

The reason you get DD 5.1 on Casino Royale, is because it has DD track, the reason you get stereo on a movie with only DTS I already explained in my first post here.

I know PS3 wouldn't auto select anything other than DD by itself, but the disc itself might be flagging one of the tracks as default and PS3 would respect that. This would explain why your brother gets DTS and you get DD on the same disc (if DTS is default, but you can't stream it to your receiver, PS3 switches to its beloved DD, the thing it can stream).

[mmace]

The reason you get DD 5.1 on Casino Royale, is because it has DD track, the reason you get stereo on a movie with only DTS I already explained in my first post here.

I know PS3 wouldn't auto select anything other than DD by itself, but the disc itself might be flagging one of the tracks as default and PS3 would respect that. This would explain why your brother gets DTS and you get DD on the same disc (if DTS is default, but you can't stream it to your receiver, PS3 switches to its beloved DD, the thing it can stream).so if that's the case, if I add DTS as track 1 and DD as track 2 on the movie I'm doing my PS3 will play DD5.1 and my brothers will play DTS? (like I said before)
thought it didn't do that?

[lexor]

so if that's the case, if I add DTS as track 1 and DD as track 2 on the movie I'm doing my PS3 will play DD5.1 and my brothers will play DTS? (like I said before)
thought it didn't do that?

If PS3 will respect the track order, then yes, you'll have DD and your brother DTS. But I don't know how you flag tracks as default on a Blu-ray, it might be some sort of a tag (like it is in mkv), if it is a tag and not track order then you'll both get DD by default.

You should ask the people in HD DVD & Blu-ray forum about authoring and how to ensure default track selection. Or just burn the disc and see if PS3 will respect track order and play DD for you and DTS for him.

[mmace]

cheers for all the help lexor, it's much appreciated