[pulseaudio-tickets] [Bug 94563] Option to minimally upmix or remap "mono" channel only (for speaker configurations greater than 2.x)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94563

--- Comment #7 from Raymond <superquad.vortex2 at gmail.com> ---
It is the hda-intel driver which upmix stereo to  5.1 or 7.1


if card 1 is your hda intel with analog codec 


speaker-test -c2 -t wav -D hw:1,0 

You have to ask the author who wrote the patch 
"feed front to surround"

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