DD5.1 and DTS-MA carry the same sound?

[PoorSignal]

I am just curious, beside having high quality lossless audio.

As far as the presence of sounds in each of the 6 channels, how does the DVD version DD 5.1 differ from DTS-MA (or, DD True HD) on blu ray? Say a bullet fly around the room, would you pretty much hear the same thing with both DVD and blu ray.. Or is the sound often being remixed to release on blu ray to give it more ambience and separation, etc?

[StimpsonJCat]

DD 5.1 is lossy and DTS-MA & TrueHD are lossless. In general the lossless track will contain more information and sound better. Basically with lossless whatever is fed in is fed out exactly the same. And lossy will lose some info along the way.

But, how the track is mastered, bit rate, etc. also plays a big part in the quality of the sound. Also the equipment in your setup will make a big difference in hearing the improved quality of a lossless track.

[JamesN]

I think the op is asking: ignoring all of the obvious quality differences between the two, is the overall mix the same between the two? That is: is the soundfield staged in the same manner?

The op can correct me if my interpretation is wrong.

[Kryptonic]

If you're playing a BD through an older receiver through optical or coaxial, you'll get the "core" tracks from DTS-HDMA and TrueHD. DTS-HDMA sounds better this way because the core track is 1.5mbps, whereas the TrueHD track will be 640kbps. Both sound better than DVD with more dynamics and definition. The quality of the sound is more dependent on your speakers and equipment than anything. A core track through a quality system will give you an incredible soundfield. Bitrates beyond 1.5mbps rarely offer an audible difference anyway to be honest.

[PoorSignal]

Originally Posted by JamesN

I think the op is asking: ignoring all of the obvious quality differences between the two, is the overall mix the same between the two? That is: is the soundfield staged in the same manner?

The op can correct me if my interpretation is wrong.

Yes that is what I am asking.
I have the movie original Fast and Furious and the sound on BD blows me away, I have to pop in DVD now and have a listen again.

[BozQ]

Originally Posted by JamesN

I think the op is asking: ignoring all of the obvious quality differences between the two, is the overall mix the same between the two? That is: is the soundfield staged in the same manner?

The op can correct me if my interpretation is wrong.

JamesN most probably got the right intepretation here.

And to answer that question? We don't know for sure. But very high chance that both Lossy and Lossless used the same master for compression.
There might be a few exceptions when the lossless option came with a 6.1 or 7.1 option and we won't know how exactly those are done unless someone from the inside clarify and explain.

[StimpsonJCat]

Originally Posted by JamesN

I think the op is asking: ignoring all of the obvious quality differences between the two, is the overall mix the same between the two? That is: is the soundfield staged in the same manner?

The op can correct me if my interpretation is wrong.

The lossless tracks also support greater bit rates:

DTS-MA 24.5 Mbit/s (24-bit, 192 kHz)
vs
DTS 1,536 kbit/s

TrueHD 18 Mbit/s (24-bit, 96 kHz)
vs
DD 5.1 504 kbit/s

So there is more room for information and no loss of data by compression.

As far as the question of the mix being the same it depends on how they mixed it. But, if they wanted to mix a more detailed higher quality version for HD Audio they could. But, even if they mixed them exactly the same the lossless version will still have higher quality than the lossy.

Edit: I think I get it now...he wants to know if they studios are doing different mixes for lossless tracks. I don't know. It would be nice, but to save money I think they may not. But, like I said even with the same mix lossless should still have an advantage. I do know that my sub gets way more of a workout with lossless tracks.