[pulseaudio-discuss] remap-sink reproduces sound on more than the target channels

Matt Patterson matt at v8zman.com
Thu Jun 12 11:01:45 PDT 2008

Is that what I was seeing during my startup process:

D: resampler.c: Channel matrix:
D: resampler.c:        I00   I01
D: resampler.c:     +------------
D: resampler.c: O00 | 1.000 0.000
D: resampler.c: O01 | 0.000 1.000
D: resampler.c: O02 | 1.000 0.000
D: resampler.c: O03 | 0.000 1.000
D: resampler.c: O04 | 0.500 0.500
D: resampler.c: O05 | 0.500 0.500
D: resampler.c: O06 | 1.000 0.000
D: resampler.c: O07 | 0.000 1.000

I thought I tried disabling the remixing in daemon.conf without 
improvement, but I will try again. If I start pulseaudio with the -C 
command to get a command line interface will the settings in daemon.conf 
take effect since I am not creating a daemon? Or is the daemon still 
created and a pacmd instance is started right after?

I also noticed that I can produce 2 two channel alsa sinks by pointing 
them at front:1 and rear:1. Are there equivalent values for side:1 and 
center/lfe:1? I tried side:1 without avail so that can't be it.


Tanu Kaskinen wrote:
> On Thu, Jun 12, 2008 at 08:36:16AM -0700, Matthew Patterson wrote:
>> I have an update on this front. I downloaded a 8 channel wave file, and 
>> when I play it via the 8 channel sink I get perfect channel seperation. 
>> If I play the same file via one of the 2 channel sinks then I get the 
>> sound reproduced on outputs other than what that sink is tied to BUT the 
>> volumes are different making me think this is some kind of virtual 
>> surround. Does ALSA or pulse have the ability to cause this, or is this 
>> basically the sound card being annoying?
> Pulseaudio semi-intelligently makes stereo streams surround
> streams, if you have a surround sound card. Unfortunately
> this affects the streams from the remap sinks too (I think
> this will be fixed real soon now in svn, if Lennart approves
> the new behaviour). Fortunately the feature can be disabled
> in daemon.conf (disable-remixing).
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20080612/8639e716/attachment.htm>

More information about the pulseaudio-discuss mailing list