It is USB Audio:
~> cat /proc/asound/cards
0 [HDMI ]: HDA-Intel - HDA Intel HDMI
HDA Intel HDMI at 0xf7b14000 irq 39
1 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xf7b10000 irq 38
2 [S51 ]: USB-Audio - SB Omni Surround 5.1
Creative Technology Ltd SB Omni Surround 5.1 at
usb-0000:00:14.0-6, full speed
Sincerely, Nazar Mokrynskyi
github.com/nazar-pc
Skype: nazar-pc
Diaspora: nazarpc at diaspora.mokrynskyi.com
Tox: A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249
On 16.01.16 14:10, Tom Yan wrote:
> NVM I was probably wrong about those two confs.
>
> FWIW, here are the speaker-test results of my builtin 7.1 audio (HDA
> Intel PCH/Realtek ALC887-VD), when I have my only pair of stereo
> speaker connected to the Center/Subwoofer port:
>
> Firstly I tested with:
> speaker-test -D hw:PCH -c 2 -l 1
> speaker-test -D hw:PCH -c 4 -l 1
> speaker-test -D hw:PCH -c 6 -l 1
> speaker-test -D hw:PCH -c 8 -l 1
> These 4 are the layout that support natively by the driver/hardware.
>
> Interestingly, for:
> speaker-test -D hw:PCH -c 2 -l 1
> speaker-test -D hw:PCH -c 4 -l 1
> I can hear sound coming out from my speakers respectively when:
> 0 - Front Left
> 1 - Front Right
> is playing.
>
> But while I did NOT change the physical connection at all, for these:
> speaker-test -D hw:PCH -c 6 -l 1
> speaker-test -D hw:PCH -c 8 -l 1
> I can hear sound coming out from my speakers respectively when:
> 4 - Front Center (LEFT speaker)
> 5 - LFE (RIGHT speaker)
> is playing.
>
> Then I test with:
> speaker-test -D surround21:CARD=PCH,DEV=0 -c 3 -l 1
> speaker-test -D surround41:CARD=PCH,DEV=0 -c 5 -l 1
> speaker-test -D surround50:CARD=PCH,DEV=0 -c 5 -l 1
> which are the only 3 PCMs with ttable in their conf.
>
> For:
> speaker-test -D surround21:CARD=PCH,DEV=0 -c 3 -l 1
> I can hear sound coming out from my RIGHT speaker when:
> 2 - LFE
> is playing.
>
> For:
> speaker-test -D surround41:CARD=PCH,DEV=0 -c 5 -l 1
> I can hear sound coming out from my RIGHT speaker when:
> 4 - LFE
> is playing.
>
> For:
> speaker-test -D surround50:CARD=PCH,DEV=0 -c 5 -l 1
> I can hear sound coming out from my LEFT speaker when:
> 4 - Front Center
> is playing.
>
> I think you can test with similar commands. The only part you need to
> change is probably "PCH". Also the one with "-c 8" probably won't work
> on your device.
>
> Last but not least, can you paste your output of:
> cat /proc/asound/cards
> So that we can get an idea on which conf in /usr/share/alsa/cards/ is
> your card relying on?
>
> On 16 January 2016 at 17:59, Tom Yan <tom.ty89 at gmail.com> wrote:
>> I think you should use speaker-test to test the various PCMs in aplay
>> -L first, so that you can at least get a hint on whether it has
>> something to do with ALSA or pulse. For example:
>>
>> [tom at localhost ~]$ speaker-test -D surround21:CARD=PCH,DEV=0 -c 3 -l 1
>>
>> speaker-test 1.1.0
>>
>> Playback device is surround21:CARD=PCH,DEV=0
>> Stream parameters are 48000Hz, S16_LE, 3 channels
>> Using 16 octaves of pink noise
>> Rate set to 48000Hz (requested 48000Hz)
>> Buffer size range from 22 to 349525
>> Period size range from 11 to 174762
>> Using max buffer size 349524
>> Periods = 4
>> was set period_size = 87381
>> was set buffer_size = 349524
>> 0 - Front Left
>> 1 - Front Right
>> 2 - LFE
>> Time per period = 5.470904
>> [tom at localhost ~]$ speaker-test -D surround41:CARD=PCH,DEV=0 -c 5 -l 1
>>
>> speaker-test 1.1.0
>>
>> Playback device is surround41:CARD=PCH,DEV=0
>> Stream parameters are 48000Hz, S16_LE, 5 channels
>> Using 16 octaves of pink noise
>> Rate set to 48000Hz (requested 48000Hz)
>> Buffer size range from 22 to 349525
>> Period size range from 11 to 174762
>> Using max buffer size 349524
>> Periods = 4
>> was set period_size = 87381
>> was set buffer_size = 349524
>> 0 - Front Left
>> 1 - Front Right
>> 3 - Rear Right
>> 2 - Rear Left
>> 4 - LFE
>> Time per period = 9.121826
>> [tom at localhost ~]$ speaker-test -D surround51:CARD=PCH,DEV=0 -c 6 -l 1
>>
>> speaker-test 1.1.0
>>
>> Playback device is surround51:CARD=PCH,DEV=0
>> Stream parameters are 48000Hz, S16_LE, 6 channels
>> Using 16 octaves of pink noise
>> Rate set to 48000Hz (requested 48000Hz)
>> Buffer size range from 22 to 349525
>> Period size range from 11 to 174762
>> Using max buffer size 349524
>> Periods = 4
>> was set period_size = 87381
>> was set buffer_size = 349524
>> 0 - Front Left
>> 4 - Front Center
>> 1 - Front Right
>> 3 - Rear Right
>> 2 - Rear Left
>> 5 - LFE
>> Time per period = 10.953665
>> [tom at localhost ~]$
>>
>> I do feel like surround21.conf and surround41.conf is problematic
>> though. I don't see why it should map LFE that way if it relys on
>> surround51. It should be always "5 - LFE". I'll probably write to ALSA
>> devel about it soon.
>>
>> On 16 January 2016 at 17:32, Nazar Mokrynskyi <nazar at mokrynskyi.com> wrote:
>>> Noise appears when I test speaker in sound settings UI, so there is no
>>> specific command. Also, when test sound stops - clicking doesn't.
>>> I know it doesn't make sense, but it is what it is.
>>> BTW, noise appears in target output, meaning even if I do not skip output,
>>> but try to direct LFE to third output (one of rear speakers), there is no
>>> sound there, only mentioned noise.
>>>
>>> Is it possible that sound card doesn't want to output low frequency sound on
>>> other than default output, I mean some hardware/firmware limitation?
>>> I'd be fine if LFE worked with 3rd output instead of 6th.
>>>
>>> Sincerely, Nazar Mokrynskyi
>>> github.com/nazar-pc
>>> Skype: nazar-pc
>>> Diaspora: nazarpc at diaspora.mokrynskyi.com
>>> Tox:
>>> A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249
>>>
>>> On 16.01.16 10:24, Tom Yan wrote:
>>>> Sorry, I meant surround21.
>>>>
>>>> On 16 January 2016 at 17:21, Tom Yan <tom.ty89 at gmail.com> wrote:
>>>>> What do you mean by "noise in nth output starting from 1 instead,
>>>>> relatively hight frequency light clicking"? How were you testing
>>>>> exactly? speaker-test? if so what're the "-D"s you used? Can you paste
>>>>> full commands (and maybe even the text output).
>>>>>
>>>>> What you said doesn't seem to make sense. If surround51 works, then
>>>>> surround41 and surround20 should at most cause a signal/speaker
>>>>> mismatch. I don't see how it can produce some weird noise/click.
>>>>>
>>>>> On 16 January 2016 at 16:26, Nazar Mokrynskyi <nazar at mokrynskyi.com>
>>>>> wrote:
>>>>>> OK, I've spent another hour or so trying different combinations and it
>>>>>> seems
>>>>>> to be a bug inside either ALSA or PulseAudio.
>>>>>> SB Omni Surround 5.1, as you can see from name, has 6 outputs:
>>>>>> front-left,front-right,rear-left,rear-right,front-center,lfe (lets
>>>>>> ignore
>>>>>> other non-related inputs/outputs here)
>>>>>> I've done many experiments and defined which modes are working and which
>>>>>> doesn't.
>>>>>>
>>>>>> Modes that work fine:
>>>>>> - 5.1
>>>>>> - 5.0
>>>>>> - 4.0
>>>>>> - 2.0
>>>>>>
>>>>>> Modes that doesn't work fine:
>>>>>> - 2.1 (stereo only, noise in 3rd output starting from 1 instead,
>>>>>> relatively
>>>>>> hight frequency light clicking)
>>>>>> - 4.1 (quadro only, noise in 5th output starting from 1 instead,
>>>>>> relatively
>>>>>> hight frequency light clicking)
>>>>>>
>>>>>> It is clearly visible that any time I want to skip some output, for
>>>>>> instance:
>>>>>> ttable.0.FL 1
>>>>>> ttable.1.FR 1
>>>>>> ttable.5.LFE 1
>>>>>> instead of
>>>>>> ttable.0.FL 1
>>>>>> ttable.1.FR 1
>>>>>> ttable.2.LFE 1
>>>>>>
>>>>>> To direct LFE to proper output it doesn't work. This is the same reason
>>>>>> why
>>>>>> 5.0 is working fine (no skipped outputs, all consequent) and 4.1 doesn't
>>>>>> (we
>>>>>> need to skip 5th output starting from 1 and use 6th instead).
>>>>>>
>>>>>> When I try this:
>>>>>> ttable.0.FL 1
>>>>>> ttable.2.FR 1
>>>>>> ttable.1.LFE 1
>>>>>> then as expected I can hear LFE in right front output.
>>>>>>
>>>>>> Any hints from anyone what is wrong here? There are literally NO DOCS
>>>>>> about
>>>>>> how it works internally, so these experiments all I can provide at the
>>>>>> moment.
>>>>>> There were pulseaudio logs in this thread if anyone needs details.
>>>>>>
>>>>>> ALSA 1.1.0, PulseAudio 7.1, Ubuntu 16.04 x64
>>>>>>
>>>>>> Sincerely, Nazar Mokrynskyi
>>>>>> github.com/nazar-pc
>>>>>> Skype: nazar-pc
>>>>>> Diaspora: nazarpc at diaspora.mokrynskyi.com
>>>>>> Tox:
>>>>>>
>>>>>> A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249
>>>>>>
>>>>>> On 28.11.15 09:56, Raymond Yau wrote:
>>>>>>
>>>>>>
>>>>>>> I've been looking at those lines. Do you think it should be done in
>>>>>>> USB-Audio, or should it be added into separate config file specific for
>>>>>>> this
>>>>>>> sound card?
>>>>>>
>>>>>> http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/pcm/surround21.conf;hb=HEAD
>>>>>>
>>>>>> The route of surround21 is hardcoded to use surround51 , this mean your
>>>>>> ttable are used by those usb audio support 6 channels, those usb audio
>>>>>> which
>>>>>> only support 8 channels need to define their own 21 route as both
>>>>>> surround51
>>>>>> and surround71 of usb audio use route plugin
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> pulseaudio-discuss mailing list
>>>>>> pulseaudio-discuss at lists.freedesktop.org
>>>>>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> pulseaudio-discuss mailing list
>>>>>> pulseaudio-discuss at lists.freedesktop.org
>>>>>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>>>>
>>>> _______________________________________________
>>>> pulseaudio-discuss mailing list
>>>> pulseaudio-discuss at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>
>>>
>>>
>>> _______________________________________________
>>> pulseaudio-discuss mailing list
>>> pulseaudio-discuss at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>>
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
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