[mythtv-users] SPDIF Audio Stopped Working

[Patrick Oglesby]

It seems to happen whenever you have both passthrough analog and
digital sound trying to play simultaneously.  When using the analog
outputs, everything is fine, but you can't mix the encoded digital
stream with an analog PCM stream.  This flips some bit in alsa which
basically just disables PCM on SPDIF (makes it an non-audio device.)
The "iecset audio on" flips it back.

I wrote a small script to do this and bound it to a key on my remote.
Just make sure nothing is currently playing sound, hit the button,
then try again.  I think at worst you should only have to exit the
frontend.

- Patrick

On Wed, Sep 30, 2009 at 7:47 PM, Jay Foster <jayf0ster at sbcglobal.net> wrote:
>
>> Message: 7
>> Date: Wed, 30 Sep 2009 16:24:22 -0400
>> From: Patrick Oglesby <octoberblu3 at gmail.com>
>> Subject: Re: [mythtv-users] SPDIF Audio Stopped Working
>> To: Discussion about mythtv <mythtv-users at mythtv.org>
>> Message-ID:
>>        <56cb52f90909301324h7ef69567tcb182910fda1bed1 at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> On Wed, Sep 30, 2009 at 4:15 PM, Jay Foster <jayf0ster at sbcglobal.net>
>> wrote:
>>>
>>> I'm running Mythbuntu 8.10 0.21-fixes.  I've been using the SPDIF audio
>>> output for both AC3 5.1 audio and 2ch audio.  For some reason, the 2ch
>>> audio
>>> output has gone silent.  AC3 5.1 audio still works.
>>>
>>> This is true for both mythmusic and mythvideo (mplayer).  When playing
>>> 2ch
>>> audio programs, I do get sound out of the analog line out.  I used to get
>>> it
>>> out the SPDIF too.
>>>
>>> Any ideas?
>>> Jay
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>
>>
>> This is probably the alsa issue where the spdif output gets stuck to
>> passthrough and doesn't play pcm anymore, run "iecset audio on", see
>> if that helps.
>>
>>
> Thanks so much, Patrick.  That was it.  I have no idea how it got changed.
>  Even a reboot didn't correct it.
> Jay
>
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