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Troubleshooting the Steinberg UR824 with JRiver on Linux

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mwillems:

--- Quote from: dpe45 on March 21, 2022, 04:59:51 am ---Hi mwillems

I'm looking to pick up a UR824 for use on Linux so your experience is especially interesting to me.
One thing I've been unable to confirm is if all 24 channels are available when using the interface in USB Class Compliant mode.

I note you said it only shows up as 8 channels in CC mode, but maybe that is because you have nothing hooked up to the ADAT I/O.

Is there anyway you are able to confirm if 16 or 24 channels works in CC mode on Linux?

Thanks in advance
Dan

--- End quote ---

The Alsa output and pulse seem to "see" it as an eight channel output and multi-channel input device in class-compliant mode.  I don't have any ADAT inputs or outputs, so I have no way to test whether all channels are actually addressable in class compliant mode, unfortunately, but I'd doubt they'd appear if I plugged something in, because the extra inputs show up immediately in non-class compliant mode with nothing attached (and I've never seen another Linux device that advertises it's capabilities that way).

FWIW, I'm fairly sure the extra outputs are actually addressable in non-class compliant mode, as the device shows up with 26 outputs and I found a few posts online from folks that suggest they've gotten it working that way for DAW use.  I didn't get good results from the non-class compliant mode, obviously, but that doesn't mean it's impossible.  I think getting good performance in non-class compliant mode might require some device configuration in windows first, that the device will "remember" after the switch to Linux, but I'd already been using the device with windows for years so already had my preferred configuration. 

I'll be honest, if I were starting fresh, I probably wouldn't have bought a UR824 for Linux use.  I just happened to already have one that I wanted to migrate.  My understanding is that some of the slightly older Focusrite devices are a bit better for Linux use?   

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