Spatial audio in Windows doesn't get applied to any other multichannel audio apart from the main one.

[Hajker]

Spatial audio (DTS Headphone X, Dolby Atmos or something similar) in Windows doesn't get applied to any other multichannel audio apart from the main one.

To get spatial audio working for any other track other than the main one, you have to toggle/change the subtitles.

This has been an issue for quite a while.

[Hajker]

Oh and it seems to happen only if the primary audio is 2 channels (MKV file).

[clsid2]

You can use the header editor of MkvToolNix to change which track is marked as default.

Also enable the Mixer in the audio decoder, to output a consistent number of channels to the audio renderer.

[Hajker]

You misunderstood the problem. And don't immediately assume others are stupid. I use mkvtoolnix all the time and know that you can edit which track plays first. But what I'm saying is mpc hc has an issue if you have AUDIO-1 as 2.0ch, and AUDIO-2 as 5.1ch, if you select the 5.1ch, spatial feature in windows won't apply unless you toggle subtitles.

[clsid2]

Toggling subtitles does nothing with regard to audio, except indirectly trigger a flush in the splitter. Same as with a seek action. And it also already flushes when you change the audio track as well.

[Hajker]

Sorry I don't know how the technical details work. All I know is that doing the steps I said "wakes up" the spatial audio feature and makes it sound like it's supposed to. And I'm just reporting a bug. I also tried seeking, but it doesn't turn on spatial audio.

[clsid2]

Try a different audio renderer.

I can not test spacial audio.

[Hajker]

That fixed it, thank you. Had it on Default DirectSound Device, but MPC Audio Renderer fixes the problem.