SOLVED! By this ->
https://bbs.archlinux.org/viewtopic.php?pid=1435411#p1435411 :)
2016-05-25 22:15 keltezéssel, START Nonprofit Kft. Számítástechnika írta:
Hi!
I've set almost everything which I could - and know - about pulseaudio
with surround. All of the speakers can work but I haven't got any
sound from the subwoofer/lfe. I already tried all of these tips ->
https://wiki.debian.org/PulseAudio#Surround_sound_system
There are also another problem too - when I try "Testing speakers" -
like here ->
http://alexsleat.co.uk/wp-content/uploads/2011/12/Screenshot-Speaker-Testing-for-CM106-Like-Sound-Device.png
I can't get any sound from the speakers - but when I try listening mp3
or youtube I can hear all the speakers - without the subwoofer as I
mentioned before.
Please help me!