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Is 7.1 channels in the DSP settings always 7.1?

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curiousMonkey:
I am using the Anthem AVM 70 preamp which has default modes that can be configured on each input for mono, stereo and multichannel signals. When I play 5.1 SACD and stereo CDs on my Bluray player over HDMI, the AVM 70 picks the appropriate default mode.

I configured JRiver with 7.1 channels in DSP so that surround sound movies and audio will use the maximum channels available. I also checked the box for mixing stereo as 2.1. However when I play stereo music tracks, the preamp still uses the multichannel default mode. If I reconfigure JRiver in stereo mode, the preamp does select the stereo mode.

So I am curious what JRiver does differently with the audio signal over HDMI compared to the Blu-ray player. Is there a better choice I can make in the DSP menu that will handle all audio formats seamlessly?

audunth:
I suspect it is because the when you choose 7.1 in Output Format, it will output 7.1, and when you play stereo it will still output 7.1 with 2.1 channels of sound and 5 channels silent. MC will decide what goes to the subwoofer channel. If you wanna output stereo from MC when playing stereo files, you can make another zone for stereo output, but it will then be 2.0 and your processor will handle the subwoofer(s).

You can auto switch zones based on number of channels in the file, media type etc.

audunth:
Just a question out of curiosity, with such a new and expensive surround processor, why wouldn't you just bitstream everything from MC and take advantage of the Anthem AVM 70's processing power? New formats like Atmos and DTS:X can't even be decoded by MC.

dtc:
Have you tried Source Number of Channels rather than 7.1 That will switch the number of channels depending on the input.

You cannot play SACD (DSD) over HDMI from Windows. You need to convert to PCM. That is a restriction in the HDMI hardware/drivers.

eve:

--- Quote from: audunth on October 09, 2023, 05:10:23 am ---Just a question out of curiosity, with such a new and expensive surround processor, why wouldn't you just bitstream everything from MC and take advantage of the Anthem AVM 70's processing power? New formats like Atmos and DTS:X can't even be decoded by MC.

--- End quote ---
Some people need MC's DSP engine or videoclock.

What you're seeing with it staying in 7.1 isn't a problem. JRiver is just using a 7.1 container and populating channels as needed. If you need stereo to stay as 2.0 and not 2.1, just don't use mixing.

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