[mythtv-users] AC3 passthrough

[Landon Clark]

On 6/13/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 06/13/2006 05:05 PM, Landon Clark wrote:
> > On 6/13/06 1:03 PM, "Michael T. Dean" <mtdean at thirdcontact.com> wrote:
> >> On 06/13/2006 02:44 PM, Landon Clark wrote:
> >>
> >>>> Finally
> >>>> got it to work by setting the passthrough device to be dmix.  I am not sure
> >>>> if that is good or bad, but it works so I am going with it!
> >>>>
> >> Heh.  That means that the device you've specified is not being used or
> >> your receiver is "upmixing" 2-channel to multi-channel output.  The
> >> direct-mixing plugin is only 2-channel capable, so any sound passed over
> >> it would be 2-channel only, and--as it manipulates the stream--would not
> >> be passthrough.
> >>
> >>
> > Hmmm, now I am even more intrigued since my receiver clearly thinks that
> > this is a surround sound signal...  It has the ability to convert 2 channel
> > to 5.1, but it clearly let¹s you know when it is doing that.  It labels this
> > as Dolby Digital AC3.  Any thoughts on how this might be possible in the
> > context of what you are saying above?
> >
>
> My guess is that xine is ignoring the value you specified and using the
> default ( iec958:AES0=0x6,AES1=0x82,AES2=0x0,AES3=0x2 ), which should
> work on most (if not all) cards.
>
> Mike
> _______________________________________________

I am guessing there has to be something else since if I specify this
value, it doesn't work... I am going to take a little closer look
tonight...