[mythtv-users] AC3 passthrough still doesn't work.

[Bo Najdrovsky]

Yes!  That fixed it!  IMHO, I think this port initialization belongs 
into the AC3 passthrough code in Myth, though. I still have to play 720p 
programs (FOX) through mplayer rather than Myth internal player because 
it's a bit jerky, but all 1080i source material now plays fine, and 
passes the AC3 through the spdif out to the receiver.  Thanks for the 
suggestion!


Hamish Moffatt wrote:

>Hi Bo,
>
>One idea along the lines of setting up the SPDIF stream correctly. In Xine, 
>the default device name for AC3 passthrough is
>
>iec958:AES0=0x6,AES1=0x82,AES2=0x0,AES3=0x2
>
>The :AESxxx parts set some bits up in the SPDIF stream which tell the
>receiver that it's AC3. You might try entering all of that as your
>device name in Myth (with the ALSA: prefix). I haven't tried this so I
>have no idea whether it will work.
>
>While Myth is playing, try running iecset to query the SPDIF output
>parameters.
>
>
>Hamish
>  
>