Re: [Alsa-user] cs46xx s/pdif: front/rear reversed?

[Benny S. <go...@cu...>]

> Just to follow up from this... I managed to get the optical out 
> working. I unmuted it, and put Dolby Digital (I think...) on on the 
> amplifier, and now the sound comes out of all 5 speakers. When I last 
> checked, though, sound through the previous RCA cables came out fuzzy, 
> while the optical connection was flawless... I wonder why?
>
The some cs46xx soundcards like (Hercules Game Theater) has some kind of 
loopback mode where you can get the SPDIF input signal be directly 
routed to the SPDIF output with no intervention from the DSP, I got no 
idea how this logic works,  or how to turn it on/off, there is probably 
some EGPIO's involved. But it has happen that  sometimes it's turned on 
by unmuting the SPDIF input and output on my Game Theater XP, I believe 
that it's probable that the same thing happens on other cs46xx based 
soundcards.

So if you for example has DVD player with SPDIF output, you can manage 
to connect the SPDIF output signal just go throw the soundcard, and it's 
possible to get Dolby Suround from the DVD.

/Benny