[mythtv-users] AC3 passthrough

Kevin Kuphal kuphal at dls.net
Sun Sep 19 15:05:37 EDT 2004

Dex West wrote:

>I tried to ask this question a few days ago and messed it up.  I'm using a Sound Blaster live 5.1
>with the digital out jack connected to my receiver.  For DVD's this works great I get Dolby sound
>into my reciever, but for Music and video's I get nothing.  I searched through the user list and
>developer list and say some change made to the ac3 passthrough in august that would make it work
>for music and video as well as dvd, I assumed this would fix my problem, but hasn't.  I've got AC3
>passthrough enabled and i'm using the .asoundrc file from Jarod's guide.  
>I've read that I need to modify the .asoundrc to get standard pcm data to flow through digital out
>jack.  Is this correct?  If so I'm not sure how to modify Jarod's asoundrc file to make this work.
AC3 passthrough in MythTV setup (IIRC) only passes through AC3 audio 
from a TV source if it is there.  It doesn't have anything to do with 
sending standard PCM data to digital out.  For that, you should look at  
this link from mythtv.info


I hope that helps.

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