[alsa-devel] Multistreaming Playback using Front Panel Headphone with realtek codec

Raymond Yau superquad.vortex2 at gmail.com
Wed May 4 17:42:24 CEST 2011

Request for testers to test the patch

Multistreaming allows you to listen to one audio source through the back
panel speakers and a second audio source through front panel headphones or

Hardware requirement
1) 10 channels realtek codec (e.g. alc892) which already work with
2) Headphone at front panel and Line out at rear panel

"hw:0,0" is used for the rear panel audio jack
"hw:0,2" is used for the front panel headphone when "Independent HP" is
switched ON

Add an "Independent HP" switch to turn this feature on/off for desktop for
those HDA codec

1) speaker-test -c 8 -t wav -Dhw:0,0
2) speaker-test -c 2 -t wav -Dhw:0,2

It will need modification to support this feature for those desktop with 8
channels codec
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