[mythtv-users] spdif working but not passthrough - AV-710

[Michael T. Dean]

Byron Poland wrote:

>I have a chaintech AV-710,  I am just setting it up, and used the
>asound.conf from knoppmyth's dragon setup since it uses this card.
>
>I got spdif output working but want to enable passthrough because all
>my recordings are HD and have AC3 or 5.1 Surround sound.
>
>Despite getting the spdif working (with device set to ALSA:spdif),
>when I check the "Enable AC3 to SP/DIF Passthrough" I get no sound.
>
>I've searched the archives and tried anything I could find.
>
>Setting the device to ALSA:plug:iec978 with "Enable ... Passthrough"
>checked gets me a loud buzzing sound.  Other then that I get no
>sounds.
>  
>
The plug plugin only works with 2-channel sound.

>I'm at a loss as to what to try now.
>  
>
What does your receiver say?  The audio receiver should say something 
about the mode of data it's receiving--"PCM" or "AC-3" or "Dolby 
Digital" or something?  It's most likely a problem with your 
receiver/receiver configuration.

Mike