[alsa-devel] Help wanted: emachines em350 internal mic

Raymond Yau superquad.vortex2 at gmail.com
Fri Dec 3 03:33:26 CET 2010

>> Greetings,

>> There is only a single mic on this netbook. However, the alsa device
>> shows up as stereo, and the right channel carries an inverted copy of
>> the left channel.


>> So when the two channels are summed to make a mono (e.g. for
>> telephony, or playback on mono internal speaker) it appears that there
>> is no signal.

>> Is there a way to "cure" this problem in the driver?  I can think of
>> * Force internal mic capture to be mono (left only)
>> * Copy left to right capture
>> * Invert right capture
>> but don't know how easy any are to implement.

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