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Does mrmc still handle hd audio files as multi pcm?

Any issues that are tvOS specific
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timstephens24
Posts: 764
Joined: 09 Dec 2015, 22:43

Re: Does mrmc still handle hd audio files as multi pcm?

Post by timstephens24 » 09 Nov 2018, 18:29

Over my pay grade. :lol:
Apple TV 4K / NVIDIA Shield -> Denon X6500H 7.2.4 -> LG OLED65C6P
Channels DVR w/ HDHomeRun Connect Quattro
Patiently Testing all the things // Multiple other devices
##### SYNOLOGY 1815+ #####

aaaMMMaaa
Posts: 6
Joined: 24 Nov 2018, 19:05

Re: Does mrmc still handle hd audio files as multi pcm?

Post by aaaMMMaaa » 26 Nov 2018, 18:35

Someone in a danish forum was saying there are actually information hidden in the trueHD, DTS-HD audio streams, that are lost when converted to PCM.

Are there any truth to this argument, and is this argument valid?
In this case, all the people saying there are litterally no difference between bitstream and PCM are mistaken.

However I know for a fact this is the case with atmos, as the stream contains metadata, so data WILL be lost when converted to PCM.

cosmoxl
Posts: 1432
Joined: 12 Dec 2015, 14:16

Re: Does mrmc still handle hd audio files as multi pcm?

Post by cosmoxl » 26 Nov 2018, 19:16

aaaMMMaaa wrote:
26 Nov 2018, 18:35
Someone in a danish forum was saying there are actually information hidden in the trueHD, DTS-HD audio streams, that are lost when converted to PCM.

Are there any truth to this argument, and is this argument valid?
In this case, all the people saying there are litterally no difference between bitstream and PCM are mistaken.

However I know for a fact this is the case with atmos, as the stream contains metadata, so data WILL be lost when converted to PCM.
My understanding is that the streams may contain metadata for the dialog normalization offset for the center channel. I don't think there's anything that actually changes the quality of the audio.

This does bring up a good question though...does MrMC follow such requests (dialog normalization offset) by adjusting the levels of the multichannel PCM?

aaaMMMaaa
Posts: 6
Joined: 24 Nov 2018, 19:05

Re: Does mrmc still handle hd audio files as multi pcm?

Post by aaaMMMaaa » 29 Nov 2018, 13:37

Yes it could very likely be dialogue normalization.

He was also mentioning something about dynamics of for example explosions in a movie that could be contained in the HD audio streams.

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