Re: [alsa-devel] Surround sound not working on ALC887 based motherboard
2014/1/15 Olivier Crête olivier.crete@ocrete.ca
Hi,
I have a Asus P5G41T-M LX Plus motherboard which is ICH7 + Realtek ALC887-VD, alsa only lets me access the first 2 channels (stereo), but not the 6 other ones. It works fine in Windows. Trying to run this after killing pulseaudio fails: $ aplay -D surround40:0 -f S16_LE -r 44100 -c 4 /dev/zero -v Playing raw data '/dev/zero' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 4 aplay: set_params:1239: Channels count non available Output from alsa-info:http://www.alsa-project.org/db/?f=fe378d28f0dbb5a427b005d20866a762fd37d31a
post output of pactl list or pulseaudio verbose log
http://www.ocrete.ca/surround/pactl-list.txt http://www.ocrete.ca/surround/pulseaudio-vv.txt
you have to change channel mode from 2ch to 6ch to retask the input jacks as output if your motherboard only have three audio jacks at rear panel
How would one do that ? Pulseaudio only offers Stereo profiles.
amixer -c0 set "Channel Mode" "6ch"
do you mean pulseaudio cannot probe the surroun40 or surround51 profile ?
Yes, but I can't use it with aplay even without pulseaudio running.
Simple mixer control 'Channel Mode',0 Capabilities: enum Items: '2ch' '4ch' '6ch' Item0: '2ch'
For some reason didn't get your last email, but I saw I saw it on the archive.. Thanks for your solution, it worked! Definitely something PulseAudio should expose better.
do it really work since rear mic become active port even when it had been retasked as output ?
Ports: analog-input-front-mic: Front Microphone (priority: 8500, not available) analog-input-rear-mic: Rear Microphone (priority: 8200, available) analog-input-linein: Line In (priority: 8100, available) Active Port: analog-input-rear-mic
On Wed, 2014-01-15 at 15:35 +0800, Raymond Yau wrote:
2014/1/15 Olivier Crête olivier.crete@ocrete.ca Hi,
> > I have a Asus P5G41T-M LX Plus motherboard which is ICH7 + > > Realtek > > ALC887-VD, alsa only lets me access the first 2 channels > > (stereo), but > > not the 6 other ones. It works fine in Windows. > > > > Trying to run this after killing pulseaudio fails: > > > > $ aplay -D surround40:0 -f S16_LE -r 44100 -c 4 /dev/zero -v > > Playing raw data '/dev/zero' : Signed 16 bit Little Endian, > > Rate 44100 Hz, Channels 4 > > aplay: set_params:1239: Channels count non available > > > > > > Output from alsa-info: > > http://www.alsa-project.org/db/?f=fe378d28f0dbb5a427b005d20866a762fd37d31a > > > > > post output of pactl list or pulseaudio verbose log > > http://www.ocrete.ca/surround/pactl-list.txt > http://www.ocrete.ca/surround/pulseaudio-vv.txt > > > you have to change channel mode from 2ch to 6ch to retask the input > > jacks as output if your motherboard only have three audio jacks at > > rear panel > > How would one do that ? Pulseaudio only offers Stereo profiles.amixer -c0 set "Channel Mode" "6ch"
do you mean pulseaudio cannot probe the surroun40 or surround51 profile ?
Yes, but I can't use it with aplay even without pulseaudio running.
Simple mixer control 'Channel Mode',0 Capabilities: enum Items: '2ch' '4ch' '6ch' Item0: '2ch'
For some reason didn't get your last email, but I saw I saw it on
the
archive.. Thanks for your solution, it worked! Definitely something PulseAudio should expose better.
do it really work since rear mic become active port even when it had been retasked as output ?
The 6 outputs work at the same time. I didn't try it as a mic as I don't have a mic here...
Ports: analog-input-front-mic: Front Microphone (priority: 8500, not available) analog-input-rear-mic: Rear Microphone (priority: 8200, available) analog-input-linein: Line In (priority: 8100, available) Active Port: analog-input-rear-mic
participants (2)
-
Olivier Crête -
Raymond Yau