Apologies. It's fixed. For me, this was a digital configuration matter
found in the http://www.mythtv.org/wiki/Configuring_Digital_Sound
If you are feeding the receiver raw audio (PCM), then 'Data: audio' is
correct. However, if you are feeding it an encoded stream (Dolby AC3 or
DTS), 'Data:
** Changed in: mythtv (Ubuntu)
Status: Confirmed = Invalid
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Title:
Passthrough via SPDIF stopped working
To manage notifications about
Upgraded everything to Precise. No change. Still perfect DTS passthrough
but DD is silent although identified as DD 3/2 by receiver.
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Title:
After new upgrades, DTS 5.1 now works perfectly. DD 5.1 output is identified by
receiver but is silent. These two scenarios are true of Mythtv and VLC.
Playing Music in Mythtv is fine in PCM stereo but if I check the 'Convert
stereo to 5.1 sound:' box, the music signal to the receiver changes to
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: mythtv (Ubuntu)
Status: New = Confirmed
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I'm running 12.04 LTS and MythTV .25. Intel Sandy Bridge with SPDIF
out.
If I use ALSA, it works in two channel mode with 0.1 second pauses every
3 seconds. Nothing in the logs indicate a problem.
If I use the HW Digital Out or IEC958, the audio will play properly for
about 5 seconds and the
Thanks for the feedback. I'm in awe.
I think it unlikely to be a cable matter but will get hw to test.
I have the digital pass-through configured with Mythtv
(ALSA:hw:CARD=NVidia,DEV=3) as has worked well for months (The PulseAudio
observation was a red herring, sorry. I don't use it.).
Tried
More information:
I don't think this is a cable issue.
Pass-through DTS 5.1 works with VLC using ALSA audio output [HDA NVidia:
ALC1200 Digital (hw:0,3)] on the optical connection but not AC3. Dolby Digital
3/2 displays on receiver but no sound. This was the exact situation with Mythtv
some
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Title:
Passthrough via SPDIF stopped working
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Sounds more like a hardware/cable issue.
Try the optical SPDIF you are using with your PC with another device
like a DVD player
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Title:
Forgot to add, that 5.1 isn't supported by default with PulseAudio, so
you were never going to see in mythtv support for AC3 / DTS when using
PulseAudio
If you want AC3 and DTS, you must select an ALSA digital device , not
pulse
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