[pulseaudio-discuss] module-remap-sink question

[Matthew Patterson]

I'm glad I could help! That bug (feature for most people :) ) bothered 
me for quite a while too.

Matt


Jan Kasprzak wrote:
> Jan Kasprzak wrote:
> : 
> : > I seem to remember (I had this problem before) that pulseaudio by default
> : > applies mixing to a greater than stereo card if a stereo sample is sent
> : > to it. At the time there was a flag or option in the config file that
> : > could be set, but since I didn't end up going that route I don't have
> : > it anymore. I believe it was Lennart who gave me the hint to the issue
> : > (and might have actually fixed my specific issue in the code). This was
> : > back in 9.10, which I am still running.
> : > 
> : > Just another avenue to explore, sometimes that's all you need.
> : 
> : 	OK, I have found that PA inded does this (see the
> : src/pulsecore/resampler.c:calc_map_table() function).
> : Thanks!
> : 
> : 	It also explains my observations with special behaviour of the
> : Subwoofer/LFE channel - it is hardcoded for the LFE there).
> : It is apparently driven by the PA_RESAMPLER_NO_REMAP flag,
> : but I have to figure out where can I set this flag and whether it
> : can be done without recompiling PA.
>
> 	OK, the "remix=no" on the module-remap-sink did the job.
> I have added the description of this option to the documentation at
>
> http://pulseaudio.org/wiki/Modules
>
> 	Also, naming the all channels but the first two "aux0 to aux5"
> instead of "rear-left,rear-right,center,subwoofer,side-left,side-right"
> does the job, because the aux channels are not included in the default
> PA up-mixing. This is even written in the example, I don't know why did
> I overlooked it.
>
> -Yenya
>
>