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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?

RolandiXor
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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.