[mythtv-users] S/PDIF sound problems for PVR350 - a solution

[David]

Sorted :)

running:
 arecord -D hw:0,0 -fdat | aplay -D mixed-digital

Whilst Myth's playing works a treat...
(mixed-digital is my alsa device name)

Not checked sound quality etc yet but it's there.
Maybe myth could start a thread to do this on playback?

David

David wrote:

> The sound does come from the PVR - but then it comes back in through the
> line in and from here I  thought Myth sent it out through the PCM audio
> device with volume control.
>
> The FAQ, section 7.2 sugegsts
>  amixer set Line,0 75%,75% mute captur
> which sets lin-in to 75%, mute's it and marks it for capture
> then
>  amixer set Capture,0 100%,100% mute captur
> I interpret as mute the capture channel (so it's not heard directly),
> listen to the capture intput (line-in) at 100% and act as a capture
> device (so Myth can read it)
>
> So I want to make the pcm go through the S/PDIF - which works for 
> Mythmusic.
>
> OK, further reading suggests that Myth doesn't do this for the PVRs - 
> maybe I can run  something in parallel that captures line-in and feeds 
> it to the pcm output.
>
> David
>
>
> James Satterfield wrote:
>
>> It's my understanding that if you're using pvr350 out, the audio only 
>> comes from the pvr. AFAIK, what you want cannot be done.
>>
>> James.
>>
>>
>> David <myth at dgreaves.com> wrote:  
>>
>>> I'm trying to get s/pdif to work with myth.
>>> I'm using an onboard Via8233
>>>
>>> It works fine with mplayer but not myth.
>>> Myth is built with alsa support - I've currently (temporarily) 
>>> disabled oss-emulation in the kernel too.
>>>
>>> I've used ALSA:mixed-digital (from Michael Dean's config) and it 
>>> works very nicely with mplayer
>>> mplayer -ao alsa1x:mixed-digital my.mp3
>>> gives nice clear properly timed s/pdif output.
>>>
>>> I'm using a PVR350 and I feed the audio output back into the 
>>> soundcard's line in.
>>> Now I expected myth to be listening to the line in (marked as 
>>> capture in alsamixer) and outputting it via pcm to the spdif.
>>> But it's not.
>>>
>>> Instead I can only hear myths output when I unmute the line-in - and 
>>> of course then I'm getting analog playback.
>>>
>>> It seems like Myth is only generating sound via the PVR and isn't 
>>> then playing back line-in (at which point I would need to mute 
>>> line-in to avoid 'echo')
>>>
>>> Any suggestions?
>>>
>>> David
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>
>>>   
>>
>>
>>
>>  
>>
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>
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