If your specifcaion and user guide does not mention the support of
surround
5.1
You need to find out the internal subwoofer use both channel or just
left or
right
speaker-test -c4 -t wav -D hw:0,0
If you hear high frequency from subwoofer, this mean you need software
low
pass filtter
After removing all jacks and testing with speaker-test -c 4 -t wav -D
hw:1,0
speaker-test 1.0.29
Playback device is hw:1,0 Stream parameters are 48000Hz, S16_LE, 4 channels WAV file(s) Rate set to 48000Hz (requested 48000Hz) Buffer size range from 32 to 524288 Period size range from 16 to 262144 Using max buffer size 524288 Periods = 4 was set period_size = 131072 was set buffer_size = 524288 0 - Front Left 1 - Front Right 3 - Rear Right 2 - Rear Left ^CTime per period = 9.384977
I can hear high frequency from internal subwoofer while speaker-test printed 3 and 2.
http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/
You can build and run using git but without install pulseaudio to test 2.1 and pulseaudio lfe-filter
Two headphone jacks, internal speaker and subwoofer
There are only three playback volume controls
http://mailman.alsa-project.org/pipermail/alsa-devel/2015-June/093668.html
Your case are
A. 3 DACs, 2 HP, 2 speakers
Neither specification nor user manual mention the support of surround 5.1
It is curious because I have selected Analog Surround 5.1 Output in Sound Settings (GNOME), and I can test each individual speaker (5.1). It also works in Windows 8.1
do windows 8.1 use mic jack as clfe or surround ?
Since the user manual did not provide the mapping,
http://www.intel.com/support/motherboards/desktop/sb/CS-034198.htm
How do the other user know the mapping even if you implemented 5.1 ?
You have to follow up the above thread about the name of volume control if you think your case are
D: 3DACs 2 HP 1Mic 2 Speaker