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[haggis999]

All of my Blu-ray collection has been ripped using MakeMKV and I play them using MC32. Several of these rips are of classical music recordings with multichannel PCM soundtracks, but my Denon X8500H AV amp only sees them as stereo PCM signals and the 'Multichannel IN' sound mode is not available. However, when I play the original Blu-rays the Denon recognises the multichannel PCM and automatically invokes the 'Multichannel IN' sound mode.

Have I missed some obscure setting in MC32 that would fix this problem?

 

[cncb]

Have you set MC’s audio output to HDMI bitstreaming?

[haggis999]

Have you set MC’s audio output to HDMI bitstreaming?

I was a little unsure about whether HDMI bitstreaming should be on or off, so I tried it both ways, but it made no difference. In both cases, the INFO button on my Denon told me it was receiving a stereo signal.

[cncb]

Are you using WASAPI output instead of Direct Sound?

[haggis999]

Are you using WASAPI output instead of Direct Sound?

In both bitstreaming cases I was using Direct Sound.

[terrym@tassie]

You may have more than one audio stream in your Makemkv ripped files, it not uncommon to have multiple audio streams.
To check, play the mkv and right click on the display then look at 'Streams', if a multi channel stream is available then switch to it, MC will remember this choice for future playback.
In mkv files multiple audio streams always have one set as 'default' and this the one that MC will playback as first choice.

[cncb]

In both bitstreaming cases I was using Direct Sound.

I think you need to use WASAPI.

[haggis999]

I think you need to use WASAPI.

Last night, I checked my phone at around 4:30am here in the UK (in common with other men of my age, a trip to the bathroom in the middle of the night is a regular occurrence!) and saw this post. I was keen to try out your WASAPI recommendation, so went downstairs immediately to check it out and was delighted to find that my AV amp was now confirming the input of a multichannel PCM input 

I was not so delighted to find that I could not recreate that experience this morning. Obviously, I must have changed something, but so far have failed to find out what that might be. Grrrrr 

EDIT:  Having now woken up my brain with a cup of espresso, I fixed the problem by selecting the DENON-AVRHD (NVIDIA High Definition Audio) [WASAPI] audio setting instead of Default Audio Device [WASAPI]. My recollection of what worked at 4:30am this morning was that the Default Audio Device [WASAPI] setting was the only WASAPI setting that worked, but I must have been mistaken.