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Problems with DTS HD 5.1 sound

by juci702 / September 13, 2008 7:04 PM PDT

I just purchased a Samsung PN50A550, which is connected to my PS3 and a Panasonic SC-PT760 HTIB. I also bought Casino Royale, Night at the Museum, and Madden '09. Madden and Casino Royale play perfectly, but when I play Night at the Museum, I get no sound in English. If i change the movie to French or Spanish, the dialoge is fine, but when its English, there is no sound. My PS3 is set up to play 5.1 and all cables are snug.

Does anyone have any ideas what is wrong? Does DTS HD 5.1 sound have special requirements?

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its because
by jostenmeat / September 14, 2008 9:26 AM PDT

your htib cannot handle lossless pcm. HD/MA is unpacked by the PS3 and sent as m-ch pcm. your htib can't handle it.

most likely, the french/spanish is lossy old skool formats, which will be fine. you are using optical or something?

this is AFAIK.

and in all honesty, no offense meant to your person, but that low of a quality system will not benefit from lossless audio. if so, it will be of extremely insignificant improvement.

putting top feul into a Yugo still does not make it Formula 1.

and Im not that impressed with lossless improvements anyhow, but I still believe what Im saying.

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by jonnybones / September 14, 2008 2:28 PM PDT
In reply to: its because

Nice car analogy, as you probably know I am a fan of those.

juci702 - Your PS3 may be set to Bitstream for the audio format, changing it back to PCM may solve this problem. It is under the audio setup menu on the PS3.

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by juci702 / September 14, 2008 2:58 PM PDT
In reply to: its because

I really appreciate the input. I tried switching to bitstream output, but it didn't help.
So, to fix the problem, it seems I need to change my surround sound. Is there anyway to improve my current system (Panasonic SC-PT760) so that I can listen to my movie? (the only english audio output is lossless, so I can't change the movie settings) Or do I actually just need to buy a new receiver? And, if I need to buy a new receiver, what specs do I need to look for? I only bought my current htib because cnet listed it as the best htib under $400 (which I know = economy), but I assumed it would at least be adequate.

Thanks again for your help.

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Where to begin...
by jostenmeat / September 14, 2008 4:15 PM PDT
In reply to: Thanks

Ya know, I thought all blurays have a lossy track. IOW, something that will work. You should check out all of the english audio/surround options. Hm. There MUST be something that will work. A regular DTS track or something.

I need to clarify a statement made earlier. Your HTIB cannot handle m-ch PCM, but it CAN handle PCM ... just only 2.0 with optical.

Dont buy a new receiver. Well. When and if you ever upgrade, you most likely want to upgrade the entire audio system. New receiver with those speakers is a complete waste of money, IMO.

By far and away, the speakers and sub you choose are key. After that its easy to pick something that has enough juice to power them.

Just find out how to make the audio work. it must be something, settings, dunno. I really thought all blurays came with a lossy track as well.

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Re: Where to begin...
by juci702 / September 17, 2008 11:58 AM PDT
In reply to: Where to begin...

Actually, I finally got Night at the Museum to play using PCM output (through the optical digital line.) The problem, as suggested earlier, was that the PS3 was sending bitstream output to the receiver, and the receiver couldn't output it (but only for Night at the Museum.) The receiver has no problem outputting bitstream audio from my other bluray movie (Casino Royale). So, what I don't understand is how it can process bitstream audio from one bluray but not the other. Do characteristics from DTS HD format somehow remain with the bitstream output? (Since Night is DTS HD and Casino appears to only be Dolby/PCM.)

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by jostenmeat / September 17, 2008 2:38 PM PDT
In reply to: Re: Where to begin...

First of all, I don't have a PS3, and have never tinkered with one.

When you say PCM output, that is arguably ambiguous. PCM itself as a term is pretty ambiguous. Because I think all of this crap is actually, technically *PCM*. I know, I know, wtheck.

Ok, of the "lossless" variety, optical can ONLY do 2.0 uncompressed PCM of the lossless variety.

OTOH, pay attention now, ANY format, whether DD 5.1, DTS, True HD, DTS-MA, yes all of them whether lossy or lossless, can be unpacked (or more inaccurately, decoded) into PCM.

Receiver doesn't output bitstream. It accepts it or it doesn't. I love when people say their TV has an HDMI output. Its called an "input".

So, an educated guess why Casino works as bitstream is because it is precisely NOT a bitstream, and there is absolutely NOTHING to unpack or decoded. Its all there. The other codecs must be unzipped/unpacked/decoded.

So, uncompressed PCM on Casino Royale is, well, already PCM! Doesn't need to be unpacked or "decoded". So, you ask, then why the heck isn't everything recorded as PCM. Why the whole process? Because the codecs, even the lossless ones like MA, are actually compressed. They get you lossless sound, but they are compressed to save space on the disc.

There are actually costs to pay towards DTS and Dolby for using MA or TrueHD.

I hope this makes random sense.

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Did you ever get this solved?
by sillich01 / February 10, 2009 1:42 AM PST

I am have a very similar set-up to you...PS3, Samsung 52 LCD, Panasonic pt760. I have PS3 connected to TV through HDMI cable and I take the TV optical audio-out into the pt760. I have been able to get Dolby Digital encoded sounds from my PS3 Blue Ray player but not DTS. Seems like most Blue Rays have the english sound track in DTS. I have tried lots of different control setups within the PS3 and the 760, to no avail. Did you ever figure out how to get this to work.

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Read this
by ..ben / February 10, 2009 11:24 PM PST

I posted this almost two years ago. Yikes.

Try running the PS3 optical out to the receiver.

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