How do hd movie audio tracks differ from their analogue

Now that weвЂ™ve covered the differences between Atmos and TrueHD, letвЂ™s discuss your Xbox One X. If your receiver isnвЂ™t Atmos compatible, the extension data is ignored and the soundtrack is decoded as regular Dolby TrueHD. HereвЂ™s how that works: If you play a disc with an Atmos soundtrack, the Atmos extension data is decoded by an Atmos-compatible receiver. While Dolby Atmos and Dolby TrueHD are two separate soundtrack formats, Atmos data on Ultra HD Blu-ray is actually an extension to TrueHD that is folded into the bitstream to maintain backwards compatibility. When the soundtrack is played back in a movie theater or home environment, the audio objects are rendered by an Atmos decoder to the available speaker set, which includes overhead ceiling speakers. Dolby Atmos soundtracks, in contrast, consist of audio objects - up to 128 of them - that are mixed in a 3D soundfield during the production process. Dolby TrueHD is a lossless audio codec that supports up to eight audio channels on Blu-ray Disc.

When viewing Ultra HD Blu-rays with Dolby Atmos soundtracks, however, the receiverвЂ™s front panel will read вЂњDolby TrueHD.вЂќ Are Atmos and TrueHD the same thing? - Hans Furey / via e-mailДЄ No, theyвЂ™re not. When I watch Atmos demo videos using the Dolby Access app on the Xbox, my AVRвЂ™s front-panel LED display reads вЂњDolby Atmos.вЂќ I get the same result when I watch Netflix shows with an Atmos soundtrack. in your receiver electronics) than it is to attempt to recover the dynamics that are lost due to heavy compression.Got a tech question for Sound & Vision? Email us at I recently bought an Xbox One X console and have it connected to my Yamaha RX-A2050 AV receiver. This explains why Blu-Ray discs (which presumably cater to an audience looking for the cinematic experience) tend to have less compression than other forms of video media, such as ordinary cable television.ДЄpplying heavy compression to audio tracks on a DVD or Blu-Ray is a flawed technique: it's much easier to apply compression after the fact (i.e. Use of compression is much more pronounced and widespread today than it was in the past, which explains your observations about sound level.Д«ecause many viewers are 'casual' viewers (in the sense that they're not necessarily looking for the full-blown cinematic experience, but merely something to watch on a Saturday afternoon), modern sound engineers favor a more highly-compressed sound mix that reduces the overall change in sound levels, so that you can still hear the dialog amidst the explosions. Sound engineers employ a technique called 'dynamic range compression' to reduce the difference between the loudest and softest sounds in a recording. It's not a by-product of the Dolby encoding process, although Dolby does allow greater dynamic range. So, I'm guessing that this might just be a by-product of that encoding process.

I know (from a very limited knowledge of how it works) that Dolby is an encoding format aimed at reducing hiss, and that one of the ways it can achieve this is by lowering the overall volume of the soundtrack to a point where hiss isn't as easily detectable. Is this related to a stylistic decision made by the director/sound engineer? A technical limitation of the technology of the time? Is it related to potential problems with converting the (I'm guessing) analogue soundtrack to a digital format and compressing it? Also, playing them back through my PC, I notice the same thing. I'm convinced that it's not my sound system, as a lot of the films from the same era seem to be mixed the same way. I the versions of the films that I have and watch, at least.ДЄs an example, I've recently watched the UK version of the Blu-Ray release of Aliens, and I found that I had to turn my sound system up quite high to hear the dialogue, but turn it back down again during the action sequences (or scenes with lots of sound effects or musical queues) as I have room-mates and don't wish to disturb them just so that I can hear the dialogue. I've noticed that the musical queues and sound effects seem to be mixed at a higher volume than the dialogue. I've noticed that a lot of these films have their soundtrack's mixed in a very particular way. Note: I'm watching these on DVD or Blu-Ray, they're not rips or VHS tapes if that makes any difference. I've been watching a lot of older films lately (older, in this instance reads 'circa 80's and 70's' and mainly in the Sci-Fi and action genres), and have been asking myself the same thing as I watch each one. Answers without enough detail may be edited or deleted. Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct.

How do hd movie audio tracks differ from their analogue