[mythtv-users] HDMI audio mute/unmute problem

[Michael T. Dean]

On 10/13/2008 05:17 PM, JP Fournier wrote:
>
> Hi Folks,
>
> I'm trying to get HDMI audio working with this *780G *MB:
> http://www.jwele.com/motherboard_detail.php?419
>
> My problem is that I don't get any audio unless I manually mute and 
> then unmute the IEC958 device from the command line (either before or 
> while a recording is playing):
>
> amixer -c 1 sset 'IEC958' mute
> amixer -c 1 sset 'IEC958' unmute
>
> Interestingly, mplayer has no muting problem. For example this works 
> fine repeatedly:
>
> mplayer -ao alsa 1064_20080701133000.mpg
>
> Is there anyway I can get mythtv to do this for me when I start 
> playback?  ie is there an equivalent of a channel change script for 
> playback start and playback stop?
>
> Any thoughts or other pointers appreciated.

You need to fix your audio card configuration in ALSA using alsamixer to 
set the right*** switches--the things that many people think are 
volumes, but are not, i.e. the ones where people say, "For some stupid 
reason I have to set the IEC958 volume to 0 to get output from it--at 
100%, it's quiet...".

Mike

***Figuring out which switches (and which values for those switches) 
constitute "the right" switches is left as an exercise to the 
reader/hardware owner or other participants in this discussion.