[mythtv-users] ac3 passthrough problems

Michael T. Dean mtdean at thirdcontact.com
Mon Oct 2 12:15:45 UTC 2006


On 10/02/06 04:29, Thomas Börkel wrote:

>Michael T. Dean wrote:
>
>>Actually, it looks like MythTV completely ignores the Placebo--I mean 
>>Passthrough output device. ;)
>>
>>(The only occurrence of "PassThroughOutputDevice" in 
>>myth{tv,plugins,themes} is in the settings page.)
>>    
>>
>You must have overlooked something, because I just proofed otherwise:
>
>I have no .asoundrc and I have set:
>
>Audio device: ALSA:default
>AC3 passthrough: on
>
>Then I tried different settings for the passthrough device with 
>different outcomes:
>  
>
I stand corrected.  It seems on this one, the GUI widget uses a 
different name from the database setting (the database setting is 
"PassThruOutputDevice"--I guess to save all of 3 bytes in the 
database).  They were close enough I didn't notice the difference first 
time (or second time) I looked (I had to break things down to find the 
difference).

>ALSA:spdif -> AC3 5.1 DD sound
>ALSA:default -> "helicopter sound"
>Default -> no sound
>
>What puzzles me a bit is the difference between "ALSA:default" and 
>"Default", because "Default" should use the normal audio device, which 
>is set to "ALSA:default", it should have been the same.
>
Default means to use the value you've set for the audio output device 
(i.e. Myth's default, not ALSA's default).

Mike



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