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I have recently (mistakenly?) purchased an Arcam rpac USB DAC for my Ubuntu (12.04) PC. I have torn out all but 3 of my hairs trying to get this to work and have had absolutely no luck so far.

I can see the Arcam USB audio device when i run aplay -l, however I cannot see it listed under the Sound settings. I can see the soundcard device when running alsamixer also, but if I try and select it, alsamixer crashes, stating "cannot load mixer controls: Invalid argument".

Any ideas how to get this working (if it's even possible)? Does anyone else out there have the rpac with Ubuntu?

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ARCAM rPac on linux See the solution here:… No pulseaudio uninstall needed. – feddozz Feb 13 '14 at 11:11

here there is a solution.. ARCAM rPAC USB sound card not working on Ubuntu 12.04 but you have to uninstall pulseaudio. I tried it with Quantal and it works.

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Thanks a lot for providing an answer. I removed the second part of it since it would be more appropriate to ask that as a new questions, which you are more than welcome to do. – Chris Wilson Dec 6 '12 at 10:10
Thank you for your answer - turns out that even though I can identify my DAC in pulseaudio it won't work as long as pulseaudio is present. My DAC works now that I have removed pulseaudio but I have also lost my volume control. I can alter the PCM level in alsamixer to adjust volume but that seems rather cumbersome - any ideas how to set up alternate volume control? – user108393 Dec 15 '12 at 18:30

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