[mythtv-users] Upgraded to .20 fixes (14172), have weird digital TV sound issue
Michael T. Dean
mtdean at thirdcontact.com
Thu Aug 16 00:15:03 UTC 2007
On 08/15/2007 06:00 AM, Justin The Cynical wrote:
> Joel Michael wrote:
>
>
>> I'm getting something similar, but with a completely different setup.
>>
>
> *snip*
>
>
>> I'm not sure either, but I'd guess it's more ALSA than Myth. The
>> frontend that's having the problems is using the hda_intel driver for
>> audio output. My sound output device is set as ALSA:iec958, as I'm
>>
>
> *snip*
>
> I did some more searching, and found this on the alsa-users mailing list
> (http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg18519.html):
>
> "It is a problem with myth.
> myth should open difference ALSA devices depending on the type of
> sound being played.
> I.e. for AC3/DTS is should open the iec958 device.
>
Passthrough output device
> For PCM (stereo or mono) it should open the plug:iec958 device.
>
Audio output device
> The plug bit does the resampling and mono->stereo conversions."
>
> I'm not able to test this directly at the moment, but I am able to
> change the setting of the default audio device from ALSA:default to
> ALSA:plug:iec958 and watch the logs via vnc/ssh. It appears to work, at
> least didn't see any alsa errors going to the channel that is giving me
> fits.
>
> Try that. I'm going to try to test it tomorrow morning.
>
> Either way, I've submitted a bug report. :-)
It's not a Myth problem. It's an ALSA config/Myth config problem.
Mike
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