No Master Audio or Tru HD on Pirates of Caribbean Dead Mans Chest?

[tommyb]

Hi Guys,

Got Pirates of Caribbean-Dead mans chest from LoveFilm.

Audio options are limited to English 5.1 Dolby Digital; or English 5.1 Uncompressed.

When i select uncompressed it sends it through to my Onko 875 and Multichannel appears.

Does this simply mean that there is no DOLBY or DTS version of the HD Audio format on the disc?

I'm using Sony S350 - all audio options are set to direct & wide etc

Just that I thought all Blu-Ray had either DTS Master Audio or Dolby Tru HD?

 

[mafrost]

Tommyb

None of the "Pirates" blu-rays are provided with DTS MA or Tru-HD. They all come with uncompressed 5.1 PCM instead.

This is not necessarily a bad thing is uncompressed PCM is easily as good, if not better, than either DTS-MA or Tru-HD, it's just a different presentation.

So you will not get the DTS-MA or Tru-HD lights on your AV receiver, but you will still get excellent audio as the PCM soundtracks on all the "Pirates" blu-rays are particularly good/well engineered.

I hope this helps.

 

[Clare Newsome]

Not all Blu-rays feature Dolby/DTS HD - but what you've got is even better: Linear PCM uncompressed audio.

Remember, the DTS and Dolby HD formats - though superb - still involve some compression. LPCM doesn't.

 

[Anonymous]

Is there any way of getting a 7.1 sound from a LPCM soundtrack? ( I have Onkyo 905 with 7.1 speakers and PS3)

Thanks

 

[tommyb]

Ah I see!

Many thanks guys two brilliant and quick responses

So, it would appear that I should keep my eye out for these uncompressed audio options!

And yes, the picture looks simply stunning! watching on a Panasonic 42PZ85.

Thought it was about time I cought up with the Pirates trilogy.

 

[Anonymous]

Clare Newsome:
Not all Blu-rays feature Dolby/DTS HD - but what you've got is even better: Linear PCM uncompressed audio.

Remember, the DTS and Dolby HD formats - though superb - still involve some compression. LPCM doesn't.

Dolby True HD is lossless and DTS-HD MA can be also. Decompress the lossless stream and it's the same as it was before compression....hence the word lossless.

The only reason for any difference between an LPCM soundtrack and a Dolby TrueHD etc one is that they are taken from different sources.

 

[Clare Newsome]

probedb:Clare Newsome:
Not all Blu-rays feature Dolby/DTS HD - but what you've got is even better: Linear PCM uncompressed audio.

Remember, the DTS and Dolby HD formats - though superb - still involve some compression. LPCM doesn't.

Dolby True HD is lossless and DTS-HD MA can be also. Decompress the lossless stream and it's the same as it was before compression....hence the word lossless.

The only reason for any difference between an LPCM soundtrack and a Dolby TrueHD etc one is that they are taken from different sources.

Not quite as simple as that - you've still got bit-rates to bring into the equation. And the mastering used from those sources.

But this is nit-picking: whether LPCM or Dolby/DTS HD, it's typically a big step up from the standard mixes.

 

[Anonymous]

Totally agree about the mastering as already mentioned but....

...bit-rates have nothing to do with the quality of losslessly compressed soundtracks, the bit-rate of a lossless track is to do with how much it has been compressed, it has nothing to do with quality.

There's a reasonable description on wikipedia here - http://en.wikipedia.org/wiki/Dolby_truehd - which also has links to a page about lossless compression.

A lot of people misunderstand the word compression to mean something has been removed. If that were so you'd never get your zipped word document back.

 

[Clare Newsome]

probedb:
A lot of people misunderstand the word compression to mean something has been removed. If that were so you'd never get your zipped word document back.

Comparing a simple data file to real-time decompession of high-definition material is another over-simplication, I feel. Better there be no codec to deal with, IMO...

Oh, and 'compression' can (and often does) mean something has been removed in the AV world: just take a 128kbps MP3 file!

 

[Anonymous]

Well we'll have agree to disagree on this one My point is that saying that the uncompressed version of a soundtrack sounds better than the losslessly compressed then decompressed version of the same mastered soundtrack is incorrect.

And yes both lossy and lossless compression are used in AV.

 

[nads]

pjeast73:
Is there any way of getting a 7.1 sound from a LPCM soundtrack? ( I have Onkyo 905 with 7.1 speakers and PS3)

Thanks

You can only use the amp to represent a 7.1 track if it was recorded as a 5.1. same as you would with any 5.1.