[mythtv-users] ALSA and real AC3 passthrough

mike choy mike at acaciaclose.co.uk
Fri Dec 30 17:38:52 EST 2005


Petr Stehlik wrote:
> Lee Koloszyc píše v Pá 30. 12. 2005 v 08:16 -0500:
>
>   
>>> But does it allow for AC3 passthrough at the same time? Do you have some
>>> AC3 sound source? Have you tried say HD DVB-S or perhaps DVD replayed
>>> via the internal Myth DVD player (I guess that one would use the AC3
>>> passthrough but I use xine so I don't know).
>>>       
>
>   
>> If I am not misunderstanding you, yes dmix allows for anything to be 
>> sent through the spdif connection. 
>>     
>
> But did you try real AC3 source in MythTV? Probably some HDTV?
>
>   
>> It surely can play multiple 
>> MP3s/MythTV recording at the same time over SPDIF though.
>>     
>
> But does any of those recording have an AC3 track?
>
> I will make one of my recordings available if you don't have any.
>
> Petr
>
>
>   
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>   
You need to be careful that the system is not down-mixing your AC3 to 
PCM, cause thats how dmix does mixing.
You will get sound out of your extermal amp, but it is not AC3.

Mike C







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