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After some googling, this is already known bug in pulseaudio?
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https://bugs.launchpad.net/bugs/1843015
Title:
[USB-Audio - Xonar SoundCard, playback] No sound at all
To manage
So, in short, even though Gnome panel allows setting the device, it does
not allow handling correct /output/ when there are multiple choices?
E.g. only optical connected to receiver instead of analog.
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Bugs, which is
