On Thu, 2006-09-28 at 14:51 -0400, Brian J. Murrell wrote:
> I've been trying and trying and I just can't seem to get DD/DTS/AC3 to
> work.  My receiver receives PCM just fine so at least I know the
> physical bits are working.
> 
> I have tried both mplayer and ac3dec to drive the card into decoding AC3
> but no luck.  I believe I have the mixer settings correct.  In fact I
> think I have everything unmuted and at somewhere in the 2/3 volume
> range.  I have IEC958 Loop disabled/muted and Direct Recording Source
> set to IEC958.
> 

What hardware?  I think AC3 passthrough cannot work on Nvidia HDA
chipsets doe to proprietary undocumented hardware implementation.

Can you try the latest ALSA release?

Lee



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