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

Byron Poland wpoland at gmail.com
Sun Oct 30 10:44:43 EST 2005

On 10/30/05, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> 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
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

When pass through isn't enabled, the reciever says PCM 48 or 44
depending on the source.  When it is enabled it is blank, no channels
lit, though If I watch it closely, I see a Dec. Er. Flash up right
when I start playback. So I guess the Reciever is getting a signal, it
just can't understand it.  The reciever is a Sony STR-DE695.  I
intially set up in my computer room with an little bit older Sony
reciever, and had no luck there either, though I can't remember how
much time I spent on it.  I'll look into the reciever, but it is
auto-sensing as far as I know and just is plug and play pretty much no
matter whats on the fiber.

I'll try mplayer or xine with a nuv with surround and see how that goes.

More information about the mythtv-users mailing list