[mythtv-users] Assistance with digital audio configuration requested
John Nissley
jnissley at nissley.org
Mon Aug 19 19:52:29 UTC 2013
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.
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