[mythtv-users] ac3 passthrough problems
thomas at boerkel.de
Fri Sep 22 19:54:01 UTC 2006
>> It is funny, that this actually works, because with these setting,
>> MythTV uses the "Default" device for AC3, not the one with the hex
> Yes. But, my understanding of the "Passthrough output device" is that
> if it is set to "Default" (case sensitive) then it simply refers to
> the device defined by "Audio output device". This can be confirmed by
You're right. I had forgotten that.
> Audio output device: ALSA:digital-dmix
> Passthrough output device:
> Enable AC3 to SPDIF passthrough: [checked]
> Enable DTS to SPDIF passthrough: [checked]
> Aggressive Sound card Buffering: [not checked]
> Use internal volume controls: [not checked]
> This config would be useful if MythTV was able to detect and route
> AC3/DTS sound through the "Passthrough output device" only as needed.
It does that already. It only uses the passthrough device for AC3. For
MP2, it uses the normal device.
What I would like is, that it only uses the passthrough device for AC3 5.1.
> For example, if in MythMusic sound would not be 48kHz AC3 format and
> get routed via the "Audio output device". During OTA ATSC playback
> where AC3 formats are present MythTV would route sound via the
> "Passthrough output device" instead.
MythMusic can be configured to use another device, so no problem there.
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