Op Sat, 09 Jan 2010 00:29:31 +0100 schreef Gianluca Cecchi
<gianluca.cecchi@xxxxxxxxx>:
> Ok, I continue to feed this self-made thread, in the hope that anyone
> gives suggestions/clarifications.
> So now I have also installed F12 x86_64 into another partition of the
> same system, so that it coexists with F11 x86_64 and windows XP
>
> Some progress, probably due to the alsa version into the kernel
> (2.6.31.9-174.fc12 vs 2.6.30.10-105.fc11).
> I formerly found another thread opened in 2009 in alsa-user or
> alsa-devel where this command was referred as working through optical:
>
> aplay -D iec958:CARD=SB dts_file.wav
>
> - In my F11 this command gives no signal through the receiver, so I
> didn't mention it
>
> - But now in my F12 this commands succeeds!
>
> My receiver has:
> 3 leds controlled by a button named "mode": digital, pro logic, st
>
> 3 leds controlled by a button named "input": line, optical, coaxial
>
> When I set input button to optical and play the sample dts file with
> the command above in F12, the mode led automatically switches to
> digital, and a led named "lock" blinks and I get sound through
> optical... hurra!
> Also, the other leds referring the 5 channels switch on and I hear the
> sound through all of the 5 speakers
> This happens with pulseaudio running, so that it is not the problem....
>
> Now the help required at this point: mplayer
>
> mplayer -ao alsa:spdif with this dts sample file gives no sound in F11
> while it "almost" works in F12.
try mplayer -ao alsa:device=spdif -afm hwac3 <file>
because otherwise mplayer will decode the dts file for you
and not your receiver.
> I use almost because when I play the same file as before, the mode led
> doesn't go to "digital", but to "st".
> I can then press the mode button having it switch to "pro logic" and
> again to "st", but not to "digital"
> And the sound is not the same as with the aplay command.
>
> Is there an option to give to mplayer to have it use the device that
> in aplay is "iec958:CARD=SB"?
> It seems I didn't find the right combination.
> Or if it is possible to create an entry in asound.conf like
>
> pcm.viaspdif {
> something
> }
>
> and use then mplayer with a commad such as
>
> mplayer -ao alsa:viaspdif
>
> Thanks in advance to anyone available to give any light....
>
> Gianluca
>
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