[mythtv-users] DTS Passthrough

[Jean-Yves Avenard]

Hi

On Wednesday, June 30, 2010, mythtv <mythtv at moasat.dyndns.org> wrote:
> I just upgraded from 0.22 to 0.23.  In 0.22, I had DTS passthrough working
> on my Zotac ION board going to my DTS receiver over the coax output.  Both
> DTS and AC3 worked fine for mkv files in both myth and mplayer.  DTS tracks
> would show up as DTS on the receiver so I had that confirmation before.
>
> Since upgrading to 0.23, I no longer get any DTS streams to the receiver.
> The receiver shows the format of the stream and everything I'm getting now
> is Dolby Digital.  It seems to be re-encoding the DTS stream to AC3 because
> I DO have surround sound, just no longer in DTS format.  mplayer still
> continues to work with DTS but I would rather play everything back with
> Myth's internal player.
>
> I've tried as many combinations of settings that I can think of and I've
> searched the lists, since I thought I recalled seeing someone else with this
> problem before, but I have not found a solution.  Can anyone help with the
> settings?  Or is this even possible?
>
> My current settings are:
>
> Audio output device: ALSA:spdif
> Speakers configuration: 5.1
> Upconvert stereo to 5.1: unchecked
> Upmix: Best
> Digital output device: ALSA:iec958:{ AES0 0x02 }
> Dolby Digital: checked
> DTS: checked
> Advanced Audio Config: unchecked
>
> I also have Use internal volume controls unchecked
>
> Thanks for any help.
>
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>

If you play the file with mythfrontend or mythavtest with the log
comment -v audio,playback you would probably get some information
about what's going on.

If DTS was decoded or not, with AC3 re-encoded or not etc.