https://bugs.freedesktop.org/show_bug.cgi?id=94563
--- Comment #9 from [email protected] ---
(In reply to Raymond from comment #7)
> 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"
With analogue 5.1 I am getting front->rear copying, but not on HDMI 5.1 (which
is what I use ordinarily).
On HDMI though, with PA remixing enabled, there is still mono and stereo upmix
to all 6 channels, so that suggests that PA is doing the upmixing in that case.
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