[mythtv-users] Still no AC3 passthrough...

[Darren Richards]

On 10/12/07, Greg Arena <gma at gmadigitaldesign.com> wrote:
>
> Darren,
>
>         I un-muted the IEC958 Output in alsamixer. Until I did
> that, I was getting no audio at all. So that part appears to be
> correct - once I did that, I was able to get 2-channel audio
> working before I tried getting the pass-through to work again.
>         I'd appreciate it if you could tell me what settings are
> working for you. I have a feeling I may have tried them already.
> I'm beginning to think the problem may be somewhere else because,
> as I said in another post, running "aplay -L" results in a
> segmentation fault and I did a lot of experimenting, upgrading
> ALSA, etc.


Not sure if it'll help much, but here are my settings.  Some items are
different than what other people have posted.

Audio output device: /dev/dsp
Passthrough output device: ALSA:iec958:{ AES0 0x02 }
Enable AC3 to SPDIF passthrough: checked
Agressive soundcard buffering: not checked
Enable DTS to SPDIF passthrough: checked
Use internal volume controls: checked
Mixer Device: /dev/mixer
Mixer controls: PCM

I'm running Mythdora 4.0, updated to version 0.20.  The only things I
changed to get my turtle beach riviera working was to set the settings I
mentioned above, and un-mute iec958 inside alsamixer.  I didn't touch any
other configuration file.  I get dolby digital content from HD recordings,
as well as 2 channel PCM audio from SD recordings (or some HD recordings).
It also resamples correctly if I play back HD recordings at something other
than 1.0x speed. DVDs also play back correctly with DD or DTS.

Hope this helps...

-darren
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