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[retro]

Yes, it's now possible to let your Pc decode Atmos. It's been a long wait.
Entry fee is $400 for the required Dolby software.

Read all about it here:

https://audiophilestyle.com/ca/immersive/how-to-decode-and-play-dolby-truehd-atmos-on-windows-and-macos-r1092/

Thoughts, ideas, improvements..?!?

[retro]

Yes, I'm bumping my own topic..

Reason is, I'm surprised about the lack of responses and further discussions..?!?

Am I the only one here that think this is a really big thing?

[rec head]

PC->Pre/Pro with Dirac-> Amps. Its enough for me.

[mattkhan]

I think it would be of broader interest if it were supported natively  but the current situation is expensive and labour intensive so looks like it would appeal to a pretty small niche (which would explain the lack of comments)

[mojave]

The Atmos is only decoded for music which you have to rip to MKV. It doesn't work for movies. You also are limited to playback with the Dolby Reference Player. You can't use JRiver or anything else for playback.

[retro]

The Atmos is only decoded for music which you have to rip to MKV. It doesn't work for movies. You also are limited to playback with the Dolby Reference Player. You can't use JRiver or anything else for playback.

mojave,

You are not up to date..movies work too..
And you can use JRiver (Mac)). With 16-ch decoded Atmos sound..no need for DRP for playback any longer..

[elguapo]

You can't use JRiver or anything else for playback.

The point is which software can handle video w/ 16ch LPCM.
Based on my limited experiments we have two options both successfully playback plus DSP and upsampling to multichannel DSD256 (I'm using HQPlayer as DSP engine):

• macOS' QuickTime Player can do that but no audio delay adjustment. Suggest using DaVinci Resolve (free version is enough) to modify the audio starting frame based on your DSP's time delay and export a .mov for playback.
• Using muxer tools like MKVToolNix to make a video with 16 channels LPCM and playback from macOS' JRiver.

The latter one has more advanced audio delay adjustment and DSP. But unfortunately Windows' JRiver cannot decode the 16 channels LPCM. Still trying some other available codecs. So that's why we brought up in here and find the way out for Window's JRiver.

I personally think the extra labor for such playback method is ignorable, roughly a whole movie + demux / remux processing time and also not that hard.

[jmone]

.....I'm surprised about the lack of responses and further discussions..?!?

Am I the only one here that think this is a really big thing?

FYI - I'd be all over this like a rash simply to get MC's excellent Video Clock on my 7.2.4 setup if (or at at some point)
- ATMOS could be decoded directly by MC (without the remuxing)
- GPU's HDMI Audio Drivers support more than 8ch (eg HDMI 2.0 spec supports up to 32ch but the drivers don't)
- ?? AVR support receiving more than 8ch over HDMI (I just don't know if they do or not)

[jmone]

FYI - I had a look at that sample clip in DaVinci Resolve (Fairlight) and it certainly has 16 discrete audio tracks all with different wave forms (well one track was blank in that clip).  Pretty impressive.

[retro]

FYI - I'd be all over this like a rash simply to get MC's excellent Video Clock on my 7.2.4 setup if (or at at some point)

Agreed! And you can use Video Clock on these decoded Atmos files right now, can't you..?

ATMOS could be decoded directly by MC (without the remuxing)

No doubt, that would be the best solution. If it happens. But that's a big if..
The solution outlined in the link of my first post, it's a solution that works now.
Entry fee is $400, but IMO absolutely worth it. What kind of Atmos AVR can u buy for that amount..?

- GPU's HDMI Audio Drivers support more than 8ch (eg HDMI 2.0 spec supports up to 32ch but the drivers don't)
- ?? AVR support receiving more than 8ch over HDMI (I just don't know if they do or not)

The limits of HDMI is a non-issue in this scenario, I think? The Atmos audio is already decoded.

FYI - I had a look at that sample clip in DaVinci Resolve (Fairlight) and it certainly has 16 discrete audio tracks all with different wave forms (well one track was blank in that clip).  Pretty impressive.

Yes, it is impressive. All credit to elguapo and The Computer Audiophile..

Now we just need MC on Win to cooperate. MC on Mac and Linux already do..

[Awesome Donkey]

Now we just need MC on Win to cooperate. MC on Mac and Linux already do..

Does Windows even support 16 channel audio? Perhaps the issue isn't with Media Center itself (since it does work on Media Center for Linux and Mac) but with Windows and its drivers like WASAPI not supporting it, whereas Linux and Mac (ALSA, CoreAudio, etc.) do?

[mattkhan]

I use asio on windows, asio has no problem with higher channel counts.

[retro]

I use asio on windows, asio has no problem with higher channel counts.

Yes and no..?
Playing a file with 16-ch decoded Atmos audio only works. On Mac, Linux and Win MC.

Problem seems to be when it's 16-ch audio+video in a container like .mkv, then it won't work in MC Win.

[retro]

The movieclip, 1.6Gb, with decoded 16-ch Atmos sound:

https://www.dropbox.com/s/v7nmq3fj0j6tw30/test%20m4v%2Bmka.mkv?dl=0

[mattkhan]

I was replying to the "does windows even support 16 channel audio" point, it does. Obviously something doesn't work in some component but finding out which one is something for the MC team (i.e. Hendrik) to handle.

[retro]

mattkhan,

Hendrik is aware of the problem. Hopefully there will be a fix soon. And if he forgets, I will remind him. Because I don't really want to convert to Apple.
But I can't deny, the new Mac Mini M1's are quite qute..

And while MC of-course has had the capability to handle large number of channels for decades (?), which is one of the reasons I'm dedicated to it, it's been all about outputs .
Now we are talking inputs in a container format. Different thing, isn't it?

[mattkhan]

logs suggest it is something specific to the lav audio decoder, a 16 channel audio file is fine (so that's also an "input" as you put it just not one that appears to go via lav)

[mattkhan]

I checked on mpc-be which reports the same filter graph error so it's not an MC problem as such

Code: [Select]

MPC Matroska Source::Audio 1 [Default] (PCM, 48.0 kHz, 16.0 chn, 24 bit, 18432 kbit/s)
Audio Switcher::Out

Media Type 0:
--------------------------
Audio: PCM 48000Hz 16.0 chn 18432 kbit/s

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: MEDIASUBTYPE_PCM {00000001-0000-0010-8000-00AA00389B71}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 48
cbFormat: 40

WAVEFORMATEX:
wFormatTag: 0xfffe
nChannels: 16
nSamplesPerSec: 48000
nAvgBytesPerSec: 2304000
nBlockAlign: 48
wBitsPerSample: 24
cbSize: 22 (extra bytes)

WAVEFORMATEXTENSIBLE:
wValidBitsPerSample: 24
dwChannelMask: 0x00000000
SubFormat: {00000001-0000-0010-8000-00AA00389B71}

Media Type 1:
--------------------------
Audio: PCM 48000Hz 16.0 chn 12288 kbit/s

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: MEDIASUBTYPE_PCM {00000001-0000-0010-8000-00AA00389B71}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 48
cbFormat: 40

WAVEFORMATEX:
wFormatTag: 0xfffe
nChannels: 16
nSamplesPerSec: 48000
nAvgBytesPerSec: 1536000
nBlockAlign: 32
wBitsPerSample: 16
cbSize: 22 (extra bytes)

WAVEFORMATEXTENSIBLE:
wValidBitsPerSample: 16
dwChannelMask: 0x00000000
SubFormat: {00000001-0000-0010-8000-00AA00389B71}


[mattkhan]

Probably worth moving this to mc30 board

@retro did you notice mc30 now supports this on windows?

[etc6849]

Wow, really?  Is JRiver able to decode atmos now?  I have an RME AES card with 16 channels out.

I saw the computer audiophile link in 2022, but never tried it as there wasn't a nice software solution for movie playback.

Probably worth moving this to mc30 board

@retro did you notice mc30 now supports this on windows?