Hi Tanu, Based on test result below 4.0 setup is not supported by HW, I guess? --- $ speaker-test -D surround40:CARD=Aureon51MkII --channels=4 speaker-test 1.0.26 Playback device is surround40:CARD=Aureon51MkII Stream parameters are 48000Hz, S16_LE, 4 channels Using 16 octaves of pink noise Channels count (4) not available for playbacks: Invalid argument Setting of hwparams failed: Invalid argument $ -- Wille OH5LEP On 06/11/2013 01:36 PM, Tanu Kaskinen wrote: > On Fri, 2013-06-07 at 20:07 +0300, Wille P. Salminen wrote: >> I'd need help to configure Terratec Aureon 5.1 MK2 USB card to downmix >> 5.1 to 4.0. I have tried this time to time on linux but never got it >> working. All the other variations shows up correctly (4.1, 5.0 and 5.1) >> but 4.0 is not even listed e.g. on pavucontrol GUI. >> >> I have created a new udev rule to ensure the same configuration is >> always used. Udev calls profile "terratec-aureon-51.conf". Currently >> there exists only two mappings: 4.0 and 4.1. And only 4.1 shows up >> correctly.. > Does "speaker-test -D surround40:CARD=Aureon51MkII --channels=4" work? > > If it doesn't, there's nothing PulseAudio can do. If it does, perhaps > the PulseAudio log would contain information about why the 4.0 profile > isn't made available. Instructions for getting the log: > https://wiki.ubuntu.com/PulseAudio/Log >