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于 2014年02月04日 07:08, Raymond Yau 写道:
Hello My mainboard is ECS A780GM-A, the sound chip in it is IDT 82HD206XX6,
Is this 92HD206X ?
Maybe it is, but it is 82HD206XX6 in the top side of the chip.
Seem this codec support impedance sense
Post the output of alsa-info.sh
http://www.alsa-project.org/db/?f=ce795f0f8e31b9eb5e35cc2fed572290d14b1cda
In my bios I don't have a switch to make the font port mode into AC97 or HD Audio. In windows you need to install a driver and set the font port into AC97. In Linux, you can use the font port, but it seems that audio channel is wrong,
Check the front audio connector of your motherboard in the user manual
Check the front audio panel specification of your computer chassis whether support Jack detection of headphone and mic
Only a few multi channel AC97 2.3 codecs (e.g. ALC850) support jack detection and most AC97 front audio panel does not have jack detection circuit
http://www.intel.com/support/motherboards/desktop/sb/cs-015851.htm
I can't hear the sound in some part of a film and I can hear the stranger accent of sound in the other part of a film(or a music). But all the 7.1 channel in the back ports can output the sound match my mircophone(all are the same).
The front audio panel headphone share the front channel signal only when playing multi channel audio
You need to use applications（e.g mplayer） which can down mix multi channel to stereo or select the stereo track instead of DTS of movie DVD when you are using headphone
Well, those video are downloaded from youtube. I will try to use mplayer do that.
Thank you