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

[Raymond Yau]

>> 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.

http://git.alsa-project.org/?p=alsa-lib.git;a=commit;h=59c774ed5ee00e9623a204c3234191d6a6d8cf7a


>> 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.