Audio mix: movie & TV show streaming services vs Blu-ray - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 8 Old 10-09-2019, 10:38 PM - Thread Starter
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Question Audio mix: movie & TV show streaming services vs Blu-ray

Does a movie or TV show on a streaming service sometimes have a different audio mix than what is provided on the equivalent Blu-ray version?
A 4K UHD movie on a streaming video service vs. that same movie on 4K UHD Blu-ray.
A 1080p version of that same movie on a streaming video service vs. that same movie on 1080p Blu-ray.
Those comparisons ensure that we compare the version on the streaming service to the same version (when it comes to visual resolution) on physical media.

Obviously, most 1080p Blu-rays have DTS HD-MA mixes while most streaming services use Dolby Digital+. So yes, there is a difference in the audio codec used. And yes, Blu-ray audio is less compressed than the audio from streaming services. That's not what I'm asking about. I'm asking about differences in the audio mix itself; for example: more sound in the front channels and less sound in the surrounds, or vice-versa. Another example: lower dynamic audio range, or higher dynamic audio range.

Last edited by Drew Neilson; 10-09-2019 at 10:56 PM.
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post #2 of 8 Old 10-09-2019, 11:13 PM
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I think Netflix is different to Blu-ray etc. Think the dynamic range is lower, more suitable for home listening.

They have a spec for content. https://partnerhelp.netflixstudios.c...CATIONS-GUIDES
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post #3 of 8 Old 10-10-2019, 12:35 AM - Thread Starter
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Quote:
Originally Posted by olock View Post
That documentation is interesting. Do you know of similar documentation for other TV show and movie streaming services? The main ones that I use are Netflix, Hulu, Amazon instant video, and VUDU.
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post #4 of 8 Old 10-10-2019, 02:58 PM
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Haven't searched for others, only Netflix.
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post #5 of 8 Old 10-11-2019, 07:48 AM - Thread Starter
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Originally Posted by olock View Post
Haven't searched for others, only Netflix.
What search query/queries did you use, and what search engine? If you tell me, I can try it.
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post #6 of 8 Old 10-11-2019, 08:11 AM - Thread Starter
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Originally Posted by Drew Neilson View Post
What search query/queries did you use, and what search engine? If you tell me, I can try it.
Querying Bing with [Netflix technical specifications] (without the brackets) puts the page that you linked to at the top of my search results. I am about to try [Vudu technical specifications -gun -site:vuduoptics.com -site:eotechgear.com] (apparently, VUDU is the name of some gun accessories, and obviously that isn't what I'm looking for, so I put - next to some things that I want Bing to exclude from search results).
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post #7 of 8 Old 10-11-2019, 09:30 AM - Thread Starter
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I'm not finding many results similar to the link that was posted about Netflix but for VUDU or for Hulu. I might need to try adding to my query some relevant words that were used in that site about Netflix's technical specifications for content.
I found the following, but haven't read it yet: DELIVERY SPECs for VOD, ITUNES, NETFLIX and other requirements - Gearslutz
I haven't yet tried my query but with [Amazon Video] in it.

TV: LG 47LW5700, AVR: Onkyo TX-NR787, speakers: DCM KX speakers:DCM KX-12 Series 2 (as front left and front right), DCM KX Center Series 2, DCM KX-6 Series 2 (as side surround left and right), sources: Xbox One S, Playstation 2 (fat model), Nintendo GameCube (model with digital AV output) with GameBoy Player, Panasonic VCR (PV-4661), PC: Microsoft Surface Pro (5th generation), phone: iPhone 7 Plus
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post #8 of 8 Old 10-14-2019, 10:31 AM - Thread Starter
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There is relevant discussion going on in another thread: How do Dolby Atmos and DTS:X work on Xbox One? I have quoted some of the parts, to date, that are relevant to the subject of this thread.

Quote:
Originally Posted by Drew Neilson View Post
I just popped one of my Blu-rays--Ghost--into my Xbox, went to settings and disabled 'allow my receiver to decode audio', then played a dialog-only scene, then opened VUDU (where I own that same movie), and played that same scene, and the volume on VUDU was considerably louder.

[...]

I did another experiment with that same movie on VUDU, and set the volume level during the dialog-only scene on to what felt comfortable to my ears. That scene is followed immediately by an action scene, and I watched and listened to a part of both scenes. Then I went to the dialog scene on my Blu-ray copy in the Blu-ray Player app, set the volume level to what felt comfortable to my ears, and watched and listened to the same moments I had just watched and listened to on VUDU. On Blu-ray, the action scene seemed to be louder than on VUDU. Those two scenes together seemed to have wider dynamic audio range on Blu-ray than on VUDU. Why? I think I read somewhere that audio bit rate sets a maximum allowable dynamic range, so maybe that has something to do with it. It would be nice if, on Xbox One, there was a way to find out the streaming audio bitrate and video bitrate on VUDU, Amazon Video, etc. This is possible on Netflix by pressing down on the right thumbstick while a video is playing.
Quote:
Originally Posted by Foxbat121 View Post
There is no reason to believe BD audio track is the same as streaming services, dynamic range wise. Audio tracks on BD should have more dynamic range and hence slightly softer or lower volume.

TV: LG 47LW5700, AVR: Onkyo TX-NR787, speakers: DCM KX speakers:DCM KX-12 Series 2 (as front left and front right), DCM KX Center Series 2, DCM KX-6 Series 2 (as side surround left and right), sources: Xbox One S, Playstation 2 (fat model), Nintendo GameCube (model with digital AV output) with GameBoy Player, Panasonic VCR (PV-4661), PC: Microsoft Surface Pro (5th generation), phone: iPhone 7 Plus

Last edited by Drew Neilson; 10-14-2019 at 10:51 AM.
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