I was discussing this here once already. In 2.1 mode LFE just doesn't
work. Instead when I test LFE speaker in sound settings there is weird
long noise in one of rare speakers. I have no idea about reason of this,
so instead of 2.1 I'm using 5.1 mode, which works fine.
My system is Ubuntu 16.04 x64, so packages:
alsa-base: 1.0.25+dfsg-0ubuntu5
alsa-utils: 1.0.29-1ubuntu1
If there is any ppa to try newer packages - I can do that.
Sincerely, Nazar Mokrynskyi
github.com/nazar-pc
Skype: nazar-pc
Diaspora: nazarpc at diaspora.mokrynskyi.com
Tox: A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249
On 26.11.15 13:54, David Henningsson wrote:
> Hi and thanks for looking after your sound card :-)
>
> Just a question w r t the 2.1 stuff - what alsa-lib version are you
> using? Any release from 2015 should be fine, there was some
> improvements during 2014 to the 2.1 stuff in specific.
>
> On 2015-11-25 09:06, Nazar Mokrynskyi wrote:
>> Just want to remind once again, that without this patch microphone is
>> not working with Linux kernel 4.3+
>>
>> Sincerely, Nazar Mokrynskyi
>> github.com/nazar-pc
>> Skype: nazar-pc
>> Diaspora:nazarpc at diaspora.mokrynskyi.com
>> Tox:
>> A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249
>>
>> On 11.10.15 17:52, Nazar Mokrynskyi wrote:
>>> > Do you mean 2.1 mode won't work with all usb audio since surround
>>> 5.1 of usb audio is already using route plugin
>>> What do you mean by "all usb audio"? In 4.1/5.1 mode LFE and all other
>>> outputs work properly, it is just for 2.1, which works as stereo.
>>>
>>> > If you don't have SPDIF output/input, you need to add your card in
>>> USB-AUDIO.conf
>>> Sound card has S/PDIF output, but not input. Not sure whether output
>>> works properly though. I do not have speakers or any other hardware
>>> with S/PDIF input to test it.
>>> Sincerely, Nazar Mokrynskyi
>>> github.com/nazar-pc
>>> Skype: nazar-pc
>>> Diaspora:nazarpc at diaspora.mokrynskyi.com
>>> Tox:
>>> A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249
>>> On 11.10.15 10:34, Raymond Yau wrote:
>>>>
>>>> >
>>>> > In 2.1 mode LFE is not actually working at all, so it is removed.
>>>>
>>>> Do you mean 2.1 mode won't work with all usb audio since surround 5.1
>>>> of usb audio is already using route plugin
>>>>
>>>> USB-Audio.pcm.surround51.0 {
>>>> @args [ CARD ]
>>>> @args.CARD { type string }
>>>> @func refer
>>>> name {
>>>> @func concat
>>>> strings [
>>>> "cards.USB-Audio."
>>>> { @func card_name card $CARD }
>>>> ".pcm.surround51:CARD=" $CARD
>>>> ]
>>>> }
>>>> default {
>>>> type route
>>>> ttable.0.0 1
>>>> ttable.1.1 1
>>>> ttable.2.4 1
>>>> ttable.3.5 1
>>>> ttable.4.2 1
>>>> ttable.5.3 1
>>>> slave {
>>>> pcm {
>>>> type hw
>>>> card $CARD
>>>> device 0
>>>> }
>>>> channels 6
>>>> }
>>>> }
>>>> }
>>>>
>>>> http://git.alsa-project.org/?p=alsa-lib.git;a=blobdiff;f=src/conf/cards/USB-Audio.conf;h=ce3ae019f7f6fa91ca224074d12891217f242300;hp=8a6d9cac6ead765108e09c61914a84d290482556;hb=1af088e39b75a0a0897c7036487b143e983cd423;hpb=57b5076c30b3453ee843912c0aeb3df8dbee3f68
>>>>
>>>>
>>>> > With Linux 4.3-rc1+ Mic/Line are hw:%f,0,0 as it should be:
>>>> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/usb?id=5ee20bc792467d7d612157e0a9962765aa943b08
>>>>
>>>> > So now we support both Linux 4.2.x- and 4.3-rc1+ setups.
>>>> > Also in Linux 4.3-rc1 S/PDIF input was detected incorrectly (there
>>>> is no such hardware input), so it is not present in config.
>>>> > ---
>>>>
>>>> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1384952
>>>>
>>>> Seem all usb audio with more than two playback devices are affected
>>>> since capture device of U7 is also device 1 before the patch
>>>>
>>>> If you don't have SPDIF output/input, you need to add your card in
>>>> USB-AUDIO.conf
>>>>
>>>> # If a device does not use the first PCM device for digital data,
>>>> the device
>>>> # number for the iec958 device can be changed here.
>>>> USB-Audio.pcm.iec958_device {
>>>> # "NoiseBlaster 3000" 42
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> 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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