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I'm trying to play some sounds using my standard sound card while playing some other sounds over another soundcard. How can I set which application uses which soundcard. I only found ways to set all applications to use one of the two.

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We can direct the output of a running application to another soundcard or sink with pavucontrol Install pavucontrol as depicted here:

enter image description here

These settings are valid as long as the application is running, however they can not (yet) be made permanent.

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Very cool! I wish they had that for OS X! – daviesgeek Jul 22 '12 at 7:28

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