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Solved [Linux] No pass through audio with CK804 - Printable Version

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+---- Thread: Solved [Linux] No pass through audio with CK804 (/showthread.php?tid=156043)

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[Linux] No pass through audio with CK804 - Xenomes - 2013-02-13

I have a fresh installed XBMCBuntu (Frodo) system, But I don't have digital pass through to my receiver. The onboard chip is a Realtek ALC850 (CK804). In the previous version (Eden) I had to use this custom device "surround51:CARD=CK804,DEV=0". Is there a way to use this in Frodo as a custom device? Or a asound.conf setting te redirect to "surround51:CARD=CK804,DEV=0"?

RE: No pass through audio with CK804 - raovq - 2013-02-14

can I emphasize this, I have the exact same problem after just upgrading to froddo. It worked perfectly using the above settings, but now the option is gone.

Re: No pass through audio with CK804 - nickr - 2013-02-15

Make an asound.conf file defining default audio device as the device you want to direct sound to.

RE: No pass through audio with CK804 - Xenomes - 2013-02-15

Yes I have being trying to, I am so far that I can select default by "Audio Output Device" but not by "Passthrough Output Device". When using asound.conf what Output must be selected "Analog, digital or hdmi"?

Re: No pass through audio with CK804 - nickr - 2013-02-15

You can't pass digital audio through to that device I don't think.

RE: No pass through audio with CK804 - Xenomes - 2013-02-15

Yes it can, but I have now created a asound.conf witch can be selected in both devices

Code:
pcm.iec958_dmixer {
        type dmix
        ipc_key 1024
        ipc_key_add_uid false
        ipc_perm 0660
        slave {
                pcm "hw:1,0"
        }
}

Tomorrow morning I can test the asound.conf. TV is in use now. Sad

Re: No pass through audio with CK804 - nickr - 2013-02-15

I meant the surround51 device - that is the device that outputs analogue audio to the speaker connects at the back of the pc. Looks like you have it sorted.

RE: No pass through audio with CK804 - Xenomes - 2013-02-15

It is strange, but in the old version of XBMC "surround51:CARD=CK804,DEV=0" was use for passthrough! AC3 and DTS was showing up on my receiver display.
I hope the new config will work. tomorrow I know!

RE: No pass through audio with CK804 - nickr - 2013-02-16

I have to say I find much (probably all) of alsa extremely confusing, but this seems to say surround51 is analog out:

http://alsa-project.org/main/index.php/DeviceNames#surround51

Ahh well you have it working, so no need to worry too much Smile

RE: No pass through audio with CK804 - Xenomes - 2013-02-16

Eureka! The script is working. Ac3 and DTS passthrough is working perfectly. now we can enjoy the movie again!

RE: [Linux] No pass through audio with CK804 - raovq - 2013-02-16

so to get this card working you just made an asound.conf containing just what you posted earlier?

I downgraded my xbmc after this post got no hits, ill give it a go tonight.

RE: [Linux] No pass through audio with CK804 - raovq - 2013-02-16

Just upgraded, added /etc/asound.conf but no change. I can still only select the same options as before the file, and still no DTS or dolby output. any ideas?

edit: asound.conf seems to make no difference to what XBMC shows. how can I add a sound card to xbmc?

RE: [Linux] No pass through audio with CK804 - Xenomes - 2013-02-16

(2013-02-16, 14:52)raovq Wrote: so to get this card working you just made an asound.conf containing just what you posted earlier?

I downgraded my xbmc after this post got no hits, ill give it a go tonight.

(2013-02-16, 15:16)raovq Wrote: Just upgraded, added /etc/asound.conf but no change. I can still only select the same options as before the file, and still no DTS or dolby output. any ideas?

edit: asound.conf seems to make no difference to what XBMC shows. how can I add a sound card to xbmc?

I have notice that when the <resample>48000</resample> is use in the advancedsettings.xml the new device cant be selected! check if you are using it and comment them out.

If it is right this device will show up as: "NVidia CK804, NVidia CK804 S/PDIF" Notice the wrong one is "NVidia CK804, NVidia CK804 - IEC958 S/PDIF"

After selection in the guisettings.xml will show this.

Code:
<audiooutput>
   <audiodevice>ALSA:iec958_dmixer</audiodevice>
   ...
   <passthroughdevice>ALSA:iec958_dmixer</passthroughdevice>
</audiooutput>


RE: [Linux] No pass through audio with CK804 - Xenomes - 2013-02-25

This code work with multi audio cards and optimized of the CK804

/etc/asound.conf
Code:
pcm.iec958_dmixer {
        type dmix
        ipc_key 1024
        ipc_key_add_uid false
        ipc_perm 0660
        slave {
                pcm "hw:CK804"
                rate 48000
                period_time 0
                period_size 1024
                buffer_size 32768
        }
}

Select "NVidia CK804, NVidia CK804 S/PDIF" in XBMC by both devices

RE: [Linux] No pass through audio with CK804 - MockTurtle - 2013-02-25

lucky yours was a simple fix. still tearing my hair out.
with the custom option removed, my video plays at 2x speed if i tick dts/digital passthrough (i've a c-media usb sound card).
this was so simple on prev versions...