[alsa-devel] Intel HDA & Realtek issues on ASUS G751JM

[Raymond Yau]

> > 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