[mythtv-users] Analog line in to digital sound out?

Trond Eivind Glomsrød teg at pvv.org
Sat Jan 1 12:55:36 EST 2005


MasterC wrote:

>On Fri, 31 Dec 2004 21:04:37 -0600
>Drew Bernat <abernat at zathras.net> wrote:
>
>  
>
>>Replying to myself... sigh.
>>
>>I saw earlier comments about setting the IEC958 and "Analog to IEC958" 
>>    
>>
>options in the mixer. Both of these are set, but I still get no sound. 
>Does anyone know if there has been a change in the ALSA code in recent 
>kernel versions?
>  
>
>>Drew
>>
>>
>>On Dec 31, 2004, at 8:48 PM, Drew Bernat wrote:
>>
>>    
>>
>>>I'm hoping someone knows how to pull this off.
>>>
>>>I sent out an email a couple of days ago asking if anyone knew how to 
>>>      
>>>
>get the NForce chipset (with ALSA) to play from line in. As it turns 
>out, I was playing... on the analog output instead of the digital 
>output.
>  
>
>>>Situation: I use a PVR-350 as TV out. Quality is much better when 
>>>      
>>>
>using the PVR MPEG decoder instead of the frame buffer, but that means
> that sound comes out the PVR 350 instead of my NForce digital. I have
> the PVR output connected to the NForce line in, and I can hear sound 
>on the _analog_ output, but not the digital.
>  
>
>>>Does anyone know how to convince the ALSA driver (kernel 2.6.9) to 
>>>      
>>>
>play the line in on the digital out as well as analog out?
>  
>
>>>Thanks,
>>>Drew
>>>
>>>--
>>>Drew Bernat
>>>Paradyn Project                                                  __  ____
>>>bernat at cs.wisc.edu                                                |  |  |
>>>abernat at zathras.net                                                  |  |
>>>      
>>>
>
>
>Indeed, that's the key.  I ran this problem for 2 days solid trying to get
>SPDIF to work, but it just seemed a complete loss.  There should be 3
>'volume' levels on that particular mixer setting.  Setting it to the
>various levels enables/disables different types of output from your
>digital jack.  It should be the AC97-SPSA that you are looking at, and it
>should be set to '0'.  I've also got the AC-Link option enabled on the
>'playback source'.
>  
>
Doesn't work here, with a very similar setup...  Shuttle SN95G5, running 
FC3 x86_64
and ia32.  Everything playing to alsa, except for line-in which is where 
the TV sound is..
I can hear it on the analog out.



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