[mythtv-users] Dolby Digital Signal indicator on Receiver

[Bas Wielens]

I had (and still have) similar problem, I solved it by typing 

iecset audio 0

inside a shell.

This way it will set the non-audio bit in the header of the SPDIF package. The only disadvantage is that you should do this manually inside a shell and that you have to set it back when listing to stereo music. Let me know if this works for you. Normally you could specify this inside the frontend settings for video in the pass-through output device like:

ALSA:iec958{AES0 0x06} or ALSA:iec958{AES0 0x02}

In my case however this does not work (Latest alsa driver for the nForce4 snd_intel…), so I am stuck to the manual workaround, unfortunately. 

Let me know if setting of the non-audio bit worked for you and if the pass-through devices specified above are working. 



----- Original Nachricht ----
Von:     Darryl Hirschler <Darryl.Hirschler at practiceworks.com>
An:      Discussion about mythtv <mythtv-users at mythtv.org>
Datum:   26.03.2008 15:19
Betreff: Re: [mythtv-users] Dolby Digital Signal indicator on Receiver

> Just a guess, but is it possible Myth is down-grading the audio to
> 2-channel Dolby Pro Logic?  That's a sort of pseudo-surround and might
> be enough to fool you into thinking that you are getting true surround.
> Check and make sure each of your back speakers are independent of each
> other and not playing the same sound.
> 
>  
> 
>  
> 
> Darryl
> 
>  
> 
> ________________________________
> 
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of dexter sl
> Sent: Wednesday, March 26, 2008 10:05 AM
> To: mythtv-users at mythtv.org
> Subject: [mythtv-users] Dolby Digital Signal indicator on Receiver
> 
>  
> 
> Hi everyone, I have a Denon AVR-2700.  Right now my mythfrontend is
> hooked up via the optical connection from my Turtle Beach Riviera.  I
> get sound for my recordings, mythvideo, and mythdvd all through the
> SPDIF including 5.1 apparently, and I get sound from my receiver just
> fine.  
> 
> Whats interesing is now that I am getting 5.1 to my surround sound
> system I see the Dolby "Pro Logic" indicator light up, I see the
> "DIGITAL" indicator light up and the "LOCK" green indicator light up,
> but I don't actually see the "Dolby Digital" red indicator light up.
> 
> Now when the THX intro plays on movies from my mythfrontend, I here the
> sound moving through the speakers like I normally would when playing
> from a regular DVD player outputting Dolby Digital 5.1, with the
> exception that the "Dolby Digital" red indicator lights up when the 5.1
> comes from a regular DVD player, but not when it comes from the
> mythfrontend.
> 
> So, Dolby Digital appears to by working fine from my mythfrontend, I am
> just curious if anyone can explain why my "Dolby Digital" indicator
> might not light up even though I am hearing the 5.1 audio through my
> surround sound system.
> 
>  
> 
> ________________________________
> 
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