[mythtv-users] Assistance with digital audio configuration requested

Joseph Fry joe at thefrys.com
Mon Aug 19 23:50:35 UTC 2013


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
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>


More information about the mythtv-users mailing list