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

[Raymond Yau]

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
speakers.

Hardware requirement
1) 10 channels realtek codec (e.g. alc892) which already work with
model=auto
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

Test:
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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