[alsa-devel] multistream singlechanel DACs
Developers,
how to enable multiple playback streaming?:
I am manipulating bios verb pin table, for special analog hardware, using ALC886 and kubuntu / 64bit.
I need a number of separate stereo (only stereo) i/o's I have correctly configured inputs: 4. single stereo adc port-C 1Ah 5. single spdif input 1Fh I have configured 3 independent stereo outputs, but ALSA is joining them into one pcmC1D0p device. 1.port-A,15h 2.port-E,1Bh 3.port-D,14h I have tried this on win7 and I got all associations as a separate devices. in my kubuntu 12.4LTS I have only one playback device. Mixer is showing even more then needed number of volume controls, But there is only one playback device. it seams, all 3 outputs are connected to single DAC. I have tried to buildup more input devices - this is working good. I can have up to 3 (pcmC1D0c, pcmC1D1c pcmC1D2c) I can also have 2 outputs if I enable spdif-out. But there is no separate DAC assignment to separate devices resulting from my config.
Is it possible to get independent DACs devices under ALSA? or else is no such configuration possible and I have to use single multiple channel device?
2012-8-24 上午1:10 於 "Rafal Powierski" powierski@mediascore.de 寫道：
Developers,
how to enable multiple playback streaming?:
I am manipulating bios verb pin table, for special analog hardware, using
ALC886 and kubuntu / 64bit.
can you post the output of alsa-info.sh ?
I need a number of separate stereo (only stereo) i/o's I have correctly configured inputs: 4. single stereo adc port-C 1Ah 5. single spdif input 1Fh I have configured 3 independent stereo outputs, but ALSA is joining them
into one pcmC1D0p device.
1.port-A,15h 2.port-E,1Bh 3.port-D,14h
how do you configure them as non multi channel pin complex ? different association and zero sequence instead of same assosication and asscending sequence for multi channel pin complex with color jacks.
I have tried this on win7 and I got all associations as a separate
devices.
in my kubuntu 12.4LTS I have only one playback device.
this is the multi channel out device with headphone using front channel
the major problem is pulseaudio does not support multi- streaming
the headphone playback volume control is the slave of virtual master playback volume control.
Mixer is showing even more then needed number of volume controls, But there is only one playback device. it seams, all 3 outputs are connected to single DAC. I have tried to buildup more input devices - this is working good. I can have up to 3 (pcmC1D0c, pcmC1D1c pcmC1D2c)
it is possible to use two or more ADCs for multi channels capture similar to the multi channels playback by assign same stream tag and channel tag to the three ADCs
I can also have 2 outputs if I enable spdif-out.
the alc888s-vc seem has two independent digital output for spdif and hdmi
But there is no separate DAC assignment to separate devices resulting
from
my config.
Is it possible to get independent DACs devices under ALSA?
you can use alt_analog_playback stream for independent headphone port-A similar to those VIA codecs
the datasheet only mention 7.1 + 2 multi streaming using front and rear audio panel
if it really work on other operating system, you may try to increase the number of substreams of the alt_analog_playback and assign DACs to each alt_analog_playback substreams similar to the way which the driver assign ADCs to the capture substreams
however you need to disable the multi channel analog playback stream
or else is no such configuration possible and I have to use single
multiple channel device?
the alternative is to use jackd
Thank you for your help Raymond.
the alsa-info.sh output is http://www.alsa-project.org/db/?f=bebb43deb4c3911cfe8a2181925b9723dfee0993 and attached. bios table (also attached): I tried separate associations, also association 0Fh, always sequence 0. both worked for win7. However it was important to have different device_type - otherwise the outputs are only visible but not quite operational.
documentation say "all dac support independent 16/20/24-bit, 44.1k/48k/96k/192kHz sample rate", actually it would be perfect to have 4+2 DACs if I can route it to my-defined outputs. Also 2+2 is good, I need another 2 as a mixer out - analog pass-through- this would be configured later by application.
as you write, this was seen working in another hardware - obviously my problem can be solved by proper configuration - question is only how deep I have to dive.
for now I will try to find out what is "alt_analog_playback" - maybe then i can do configuration/routing by sending verbs to pin and mixer widgets.
BR
Rafal
Raymond Yau superquad.vortex2@gmail.com hat am 24. August 2012 um 03:55 geschrieben:
2012-8-24 上午1:10 於 "Rafal Powierski" powierski@mediascore.de 寫道：
Developers,
how to enable multiple playback streaming?:
I am manipulating bios verb pin table, for special analog hardware, using
ALC886 and kubuntu / 64bit.
can you post the output of alsa-info.sh ?
I need a number of separate stereo (only stereo) i/o's I have correctly configured inputs: 4. single stereo adc port-C 1Ah 5. single spdif input 1Fh I have configured 3 independent stereo outputs, but ALSA is joining them
into one pcmC1D0p device.
1.port-A,15h 2.port-E,1Bh 3.port-D,14h
how do you configure them as non multi channel pin complex ? different association and zero sequence instead of same assosication and asscending sequence for multi channel pin complex with color jacks.
I have tried this on win7 and I got all associations as a separate
devices.
in my kubuntu 12.4LTS I have only one playback device.
this is the multi channel out device with headphone using front channel
the major problem is pulseaudio does not support multi- streaming
the headphone playback volume control is the slave of virtual master playback volume control.
Mixer is showing even more then needed number of volume controls, But there is only one playback device. it seams, all 3 outputs are connected to single DAC. I have tried to buildup more input devices - this is working good. I can have up to 3 (pcmC1D0c, pcmC1D1c pcmC1D2c)
it is possible to use two or more ADCs for multi channels capture similar to the multi channels playback by assign same stream tag and channel tag to the three ADCs
I can also have 2 outputs if I enable spdif-out.
the alc888s-vc seem has two independent digital output for spdif and hdmi
But there is no separate DAC assignment to separate devices resulting
from
my config.
Is it possible to get independent DACs devices under ALSA?
you can use alt_analog_playback stream for independent headphone port-A similar to those VIA codecs
the datasheet only mention 7.1 + 2 multi streaming using front and rear audio panel
if it really work on other operating system, you may try to increase the number of substreams of the alt_analog_playback and assign DACs to each alt_analog_playback substreams similar to the way which the driver assign ADCs to the capture substreams
however you need to disable the multi channel analog playback stream
or else is no such configuration possible and I have to use single
multiple channel device?
the alternative is to use jackd _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
2012-8-24 下午10:07 於 "powierski@mediascore.de" powierski@mediascore.de 寫道：
Thank you for your help Raymond.
the alsa-info.sh output is http://www.alsa-project.org/db/?f=bebb43deb4c3911cfe8a2181925b9723dfee0993 and attached. bios table (also attached): I tried separate associations, also
association 0Fh,
always sequence 0. both worked for win7. However it was important to have different
device_type -
otherwise the outputs are only visible but not quite operational.
documentation say "all dac support independent 16/20/24-bit, 44.1k/48k/96k/192kHz sample rate", actually it would be perfect to have 4+2 DACs if I can route it to
my-defined
outputs. Also 2+2 is good, I need another 2 as a mixer out - analog pass-through- this would be configured later by application.
http://www.intel.com/support/motherboards/desktop/sb/cs-020642.htm#multistre...
do your hardware using headphones , line out jacks or internal stereo speakers ?
as you write, this was seen working in another hardware - obviously my problem can be solved by proper configuration - question is
only
how deep I have to dive.
for now I will try to find out what is "alt_analog_playback" - maybe then
i can
do configuration/routing by sending verbs to pin and mixer widgets.
there was a untested patch for desktop using realtek codec alc892 (7.1 + 2)
participants (3)
-
powierski＠mediascore.de -
Rafal Powierski
-
Raymond Yau