[mythtv-users] .23 Sound Issues............Please God shoot me now!!

[Jim Hendry]

On Wed, Jun 2, 2010 at 6:14 AM, Robin Gilks <g8ecj at gilks.org> wrote:

>
> > I realise I can get it working using the mythtv  Alsa Spdif output and
> >
> >> use the amplifier remote, it's just not the way I want to go and
> >> reduces the WAF a lot.
> >>
> >> So back to the original question.
> >>
> >> Did people have to tweak anything to get alsa default or pulseaudio
> >> default working?
> >>
> >>
> > Not to be flip or anything, but a Logitech Harmony remote would solve
> > your
> > problems. Unfortunately, they don't come cheap, but they are very
> > programmable for multiple devices including Myth.  Many of the MythTV
> > users
> > on this list have used them. (and I believe the WAF is OK with them;
> > others
> > may comment).
>
>
To get my S/PDIF output working regardless of whether I am using ALSA or
pulseaudio I needed to use alsamixer to unmute the digital out.  My machine
always came up with it muted.  I used alsactl to make unmuted the default.

I have the same volume problem, except my S/PDIF is going to speakers that
do not have a remote control.  I could not find a way to control S/PDIF
volume with ALSA, so I added pulseaudio to the mix.  The repository version
of mythtv in kubuntu had a pulseaudio sync issue, so I am using a patched
version from:
http://ppa.launchpad.net/shauns/mythtv-lucid-testing/ubuntu/dists/lucid/
I know that does not help on fedora, but a little googling should lead to
the patch.  The frontend has audio sync when using "PulseAudio:default"

My issue is that every fast forward and commercial skip the frontend changes
the system volume.  Every other application is happy using pulse, and pulse
is doing a good job of handling volume control.  This issue is known:
http://svn.mythtv.org/trac/ticket/8314
It will not be fixed.  I checked out hd-audio branch mentioned on that
ticket and compiled everything to see if either the bug had been fixed with
architectural changes or if I could hack something to fix it, but the
database schema had changed so I could not run the compiled frontend.  I put
this on the backburner because dealing with mysql is above my pain threshold
at the moment.

As far as I can tell the only way to control optical volume is with
pulseaudio (or esd/arts). ALSA does not seem to have a mechanism for
controlling master/pcm volume for S/PDIF.

Jim


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