Ok, can you do full duplex on the alsa level?

Play an 8-channel wave file with this command:
pasuspender -- aplay -D plughw:3 mywavefile.wav  
and when that is running, start a recording stream:
arecord -f cd -D plughw:3 -d 10 > test.wav

Is it working?

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https://bugs.launchpad.net/bugs/748937

Title:
  Lack of "Analog Surround 7.1 Output + (Digital|Analog) Stereo Input"
  sound profile for cm6206 (cm106 like) USB sound card.

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