[mythtv-users] ALSA and real AC3 passthrough

Petr Stehlik pstehlik at sophics.cz
Sat Dec 31 04:35:24 EST 2005

Chad píše v Pá 30. 12. 2005 v 18:53 -0700:
> > How would your reciever understand a mix of AC3 and PCM data at the same
> > time?  Or were you using two seperate outputs (ie: digital for AC3 and
> > analog for MP3/etc)?

> My receiver detects whether it's digital or analog and 'switches'
> accordingly from the same input.  My test is from DVD's and AVI's, as
> well as from xbox games.  I have my DVD player hooked up to my
> receiver via optical, and if a movie is AC3 (Dolby Digital) the
> receiver 'clicks' and shows a light that says "Dolby Digital". 

Same here.

And now with "ALSA:digital" the AC3 sound stream does not 'click' - the
receiver stays in analog mode and I hear just white noise. OTOH, with
"ALSA:spdif" the analog MP3 at incorrect sample rate confuses receiver
and it just sits quietly there.


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