Hi Arun!

If it helps to move the slider out of the center position, this might be 
because one of the two internal mics have an inverted phase, so when on equal 
volume, they cancel each other out. 
We currently do not have a good fix for this, except workarounds like the above 
which removes one channel. The best fix might be to insert a ttable plugin at 
the ALSA level, which can invert one of the channels.

However, if it's full duplex that's causing the problem, and it's
irrelevant of what input you're having, you might have either the
CPU/rewind problem you probably have seen me fighting on the pulseaudio
mailinglist, or a position-reporting problem (which can be tested with
the module option "position_fix" - set to 1,2 or 3).

As for this bug, we're currently waiting for Christina to report back
whether it works with the latest driver snapshot.

** Changed in: pulseaudio (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/685384

Title:
  [Realtek ALC272X] when i have the sound set on either left or right
  channels it garbles if two apps are playing sounds

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