[mythtv-users] ac3 passthrough problems

Brian J. Murrell brian at interlinx.bc.ca
Tue Sep 26 01:16:23 UTC 2006

On Fri, 2006-22-09 at 01:53 -0400, Scott wrote:
> Audio output device:  
> ALSA:iec958:CARD=0,AES0=0x6,AES1=0x82,AES2=0x0,AES3=0x2
> Passthrough output device: Default

Hrm.  I did

Audio output device: ALSA:iec958
Passthrough output device: ALSA:iec958:CARD=0,AES0=0x6,AES1=0x82,AES2=0x0,AES3=0x2

and I get digital PCM just fine for non AC3/DTS sound (i,e. analog SDTV
recordings) but nothing for a (say) 5.1 sound track.  ~sigh~

All of this is of course after trying the much more simple and
straightforward "ALSA:iec958" or "ALSA:spdif" in the Passthrough option.
Frequently I get the "helicopter blades" sound characterized elsewhere
in this thread.

> Enable AC3 to SPDIF passthrough: [checked]
> Enable DTS to SPDIF passthrough: [checked]

Of course, I do have those checked.

> Aggressive Sound card Buffering: [not checked]
> Use internal volume controls: [not checked]

And not these.

Any further ideas?


My other computer is your Microsoft Windows server.

Brian J. Murrell
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