[pulseaudio-discuss] Splitting a 7.1 device into virtual 5.1 + 2.0 devices?

[Alexander E. Patrakov]

19.04.2016 18:39, Tanu Kaskinen wrote:
> On Tue, 2016-04-12 at 22:32 +0200, 紅 蒼穹 wrote:
>>> On Sat, 2016-04-09 at 16:22 +0200, 紅 蒼穹 wrote:
>>>> When I have lfe remixing = yes (default):
>>>> - LFE is mixed to stereo output when downmixing from 5.1
>>>> - there are no low frequencies present at all in 5.1 output when
>>>> playing a stereo track.
>>>
>>> LFE remixing is supposed to move low frequencies from all other
>>> channels to the LFE channel by default. Are you saying that the LFE
>>> channel doesn't get low frequencies either?
>>
>> At least I can't hear any on any non-5.1 content. It is correctly
>> present with 5.1 content though
>
> That sounds bad. I opened a bug report:
> https://bugs.freedesktop.org/show_bug.cgi?id=95021
>
>> Speaking of volumes, is there an option to somehow boost only the LFE
>> in pulseaudio? Changing it with alsamixer gets overridden next time I
>> use my media keys.
>
> You can use e.g. pavucontrol to control the individual channels (with
> pavucontrol you need to first turn off the "lock channels together"
> option, represented by the shield icon). The media keys might still
> lose the per-channel differences, though.

I believe this is the same "do we need sum or average" concern as I 
expressed in
https://lists.freedesktop.org/archives/pulseaudio-discuss/2015-February/023224.html

-- 
Alexander E. Patrakov