[pulseaudio-discuss] [PATCH v2 0/3] alsa: Support for only-multichannel devices

[David Henningsson]

On 2014-08-08 00:36, Takashi Sakamoto wrote:
> Hi David,
>
> On Aug 7 2014 20:05, David Henningsson wrote:
>> Aha, this indeed explains it! Could you try the attached patch and see
>> if it helps against this issue, and if multichannel profiles now show up?
>>
>> // David
>
> Great. The patch allow my system to handle the devices. I can see that
> 'multichannel' profile is applied. See these logs:
>
> http://sakamocchi.jp/media/pulse-echoaudio.zip
> http://sakamocchi.jp/media/pulse-maudio.zip
>
> And I uploaded new packages including the patch.
>
> I*m a little curious about the :lfe: channel. PulseAudio transfers
> silent PCM samples for this channel against my expectation. Can we apply
> other types to 6th channel for the sink?

Could you specify what you're trying to play back?

If that is stereo, then this is expected, unless you enable lfe 
remixing, like Alexander said. If what you play back is 5.1 surround, 
then the LFE channel should remain the same. If that is not the case, we 
have a bug.

-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic