[mythtv-users] Assistance with digital audio configuration requested

[Daryl McDonald]

On Mon, Aug 19, 2013 at 7:50 PM, Joseph Fry <joe at thefrys.com> wrote:

> I am a bit confused.... are you saying that plugging in your
> headphones mutes the HDMI in windows, but not in Ubuntu?
>
> On Mon, Aug 19, 2013 at 6:50 PM, Daryl McDonald <darylangela at gmail.com>
> wrote:
> >
> >
> >
> > On Mon, Aug 19, 2013 at 5:51 PM, Mike Perkins <
> mikep at randomtraveller.org.uk>
> > wrote:
> >>
> >> On 19/08/13 20:52, John Nissley wrote:
> >>>
> >>> On Fri, 2013-08-16 at 14:28 -0700, Karl Newman wrote:
> >>>>
> >>>> On Fri, Aug 16, 2013 at 1:10 PM, Joseph Fry <joe at thefrys.com> wrote:
> >>>>          On Fri, Aug 16, 2013 at 4:02 PM, John Nissley
> >>>>          <jnissley at nissley.org> wrote:
> >>>>          > I am running close to the latest trunk of mythtv and for
> the
> >>>>          last few
> >>>>          > months I have been having some interesting challenges with
> >>>>          digital
> >>>>          > audio.
> >>>>          > I am running Fedora 18 and an intel CPU with intel graphics
> >>>>          and sound
> >>>>          > drivers.  A few months ago the digital sound stopped going
> >>>>          out through
> >>>>          > my spdif connector and started going through my DVI
> >>>>          connector that is
> >>>>          > connected with a DVI to HDMI connector to my TV.  My TV has
> >>>>          a spdif out
> >>>>          > but it only works for TV stations the TV tunes and not
> sound
> >>>>          coming in
> >>>>          > from an HDMI port.  I am trying to get the digital sound to
> >>>>          go through
> >>>>          > my SPDIF connection so I can get it to my tuner.
> >>>>          > Can anyone point me in the direction to get this resolved?
> >>>>          > Many thanks..
> >>>>
> >>>>
> >>>>          If the sound is being carried VIA the graphics cable, then
> >>>>          most likely
> >>>>          you have two sound devices in your system.  One is probably a
> >>>>          standard
> >>>>          Intel or Realtek HDA hosting your spdif.  The other is likely
> >>>>          associated with your video card.  In mythtv's playback menus,
> >>>>          make
> >>>>          sure that your explicitly telling it to use the standard
> sound
> >>>>          card,
> >>>>          not the video card.
> >>>>
> >>>> There was also a change to ALSA in kernel 3.8 which broke S/PDIF. It
> >>>> was about device numbering or something. It was broken in favor of
> >>>> fixing HDMI sound, but I think a newer version of alsa-lib can fix it,
> >>>> but you'd need to re-scan in myth. It may not solve your problem, but
> >>>> it might be something worth exploring.
> >>>>
> >>>>
> >>>> Karl
> >>>>
> >>> Thanks for your response. I am on kernel version 3.10.7-100 fc18 and
> my
> >>> alsa lib is alsa-lib-1.0.26-2.fc18.x86_64.  Do you have any idea if
> this
> >>> is the offending lib version and if so what is the best way to replace
> >>> it with a new one.  I have even tried installing a stand alone PCI
> sound
> >>> card just to make sure it was not in internal motherboard issue and
> >>> still no success.  I have basically tested with all available sound
> >>> outputs that mythtv give me and found that only the HDMI and analog
> >>> outputs work.
> >>>
> >> Despite the electrical match between DVI and HDMI, I don't believe that
> a
> >> DVI interface will carry sound. You have to be HDMI end to end for that
> to
> >> work.
> >>
> >> --
> >>
> >> Mike Perkins
> >>
> >>
> >> _______________________________________________
> >> mythtv-users mailing list
> >> mythtv-users at mythtv.org
> >> http://www.mythtv.org/mailman/listinfo/mythtv-users
> >
> >
> > May I piggy-back a related question here?  On my FE/BE dual boot, I have
> to
> > unplug the cord from the headphone jack on the PC to get audio on
> Windows,
> > (it can stay plugged into the TV) and plug it back in for Ubuntu. I have
> > HDMI out of PC and HDMI into TV. Audio should work on the HDMI for both
> > scenario's shouldn't it?
> >
> > Daryl
> >
> >
> > _______________________________________________
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> > mythtv-users at mythtv.org
> > http://www.mythtv.org/mailman/listinfo/mythtv-users
> >
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>


It's a 1/8" stereo patch cord from audio in on my TV going to the audio out
(aka headphone jack) of my PC. But yeah, when I unplug it from the PC I get
sound in windows (I assume through the HDMI) then I have to plug it back in
to get sound in Ubuntu. I would rather stay with Ubuntu but if I have to
switch (LG's blu-ray not supported in linux) it would be nice to have HDMI
audio in both cases.

Daryl
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