[mythtv-users] No HDMI audio

[John Haywood]

On 13/08/2009, at 12:44 PM, Jean-Yves Avenard wrote:

> 2009/8/13 Allen Edwards <allen.p.edwards at gmail.com>:
>> I added a note to my wiki with your comment.  Maybe it will help  
>> someone
>> else.
>>  Allen
>
> I had a look at it, and I think the approach to set up digital audio
> in Myth by playing with and .asoundrc leaving the Audio device in myth
> as
> Audio output device: ALSA:default
>
> is wrong to start with...
>
> It makes everything so much more complicated and out of reach for  
> most users
> .
> In 99% of the case using a simple ALSA:spdif , or ALSA:hw:0,3 (if
> HDMI) is all that would be required.
>
> I'm yet to find a pc with digital audio not working with either of
> those configurations...
>
> With most modern distributions, playing with .asoundrc is completely  
> unecessary


Jean-Yves,

I have the same board as you , connected via HDMI to a Sony Bravia,  
and, even though my /etc/asound.conf is set to:

pcm.!default {
	type hw
	card 0
	device 3
}

as per the results of aplay -l

I don't have ALSA:hw:0,3 as an option in MythTV. What i do have is  
Alsa:<iec958> (or similar - not at home right now).
If I try to use this, I get a staccato stuttering white noise out of  
my speakers, but only on HD channels. If I use Alsa:Default, I get no  
sound at all on said HD channels, so there must be some other  
parameters which I have set wrong somewhere.

This leads me to an observation for the wiki (though first off, thanks  
for doing it and to all who contribute)- although the mechanics of  
setting the linux side of things is quite comprehensive (ALSA, tools,  
configs), the MythTV side is a bit of a mystery - for example there  
are audio settings in both 'General' and TV playback, plus the use of  
EDID or not seems to muddy the waters

cheers

john