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 -- | Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> | | GPG: ID 1024/D3498839 Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E | | http://www.fi.muni.cz/~kas/ Journal: http://www.fi.muni.cz/~kas/blog/ | >> If you find yourself arguing with Alan Cox, you?re _probably_ wrong. << >> --James Morris in "How and Why You Should Become a Kernel Hacker" <<
