[mythtv-users] AC3 passthrough setup problems

Bob mythtv at cox.net
Fri Nov 9 01:37:21 UTC 2007

James Fidell wrote:
> I have everything working fine with normal stereo sound, so I thought
> I'd finally get around to trying to get AC3 passthrough working on my
> main front-end.
> I'm following the guidelines in the wiki at
>   http://mythtv.org/wiki/index.php/DigitalSoundHowTo
> http://mythtv.org/wiki/index.php/Configuring_Digital_Sound_with_AC3_and_SPDIF
> but when testing with mplayer (using an ISO rip of a DVD) mplayer
> spews a52 CRC errors, plays choppy sound and can't display the video
> properly either.
> I've tried changing the mythtv config as suggested and playing the same
> iso back with the internal player but get no sound at all.  In "normal"
> stereo mode, playback is fine on both video and audio.
> I think first I need to confirm that I can play back properly through
> the SPDIF connector outside mythtv.  Is there another easy way to do
> that?
> James
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> mythtv-users at mythtv.org
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Try speaker-test:


There are a lot of options, more than the web page indicates.  I was 
never able to get speaker test to make pink noise through 6 speakers, 
but I do have surround sound working.

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