I have a Terratec Aureon Space 7.1 and I'm able to play music through my digital out without any problems. There is just one thing that I can't seem to be able to do somehow. I would like to be able to duplicate channels. Currently I can only send 2 channels (left + right). I have a 5.1 DTS receiver and the necessary speakers so I would like to be able to copy the front left to the rear left and the front right to the rear right. Is this at all possible with the digital out?
No, your receiver must do this or software must encode the stream to AC3 or DTS formats. The consumer S/PDIF can do only stereo PCM.
Jaroslav
Perhaps this helps? http://essej.net/ac3jack/ Haven't tried it adverts to do just this.
Unfortunately it doesn't work as I would have hoped.
I have installed the following apps:
ffmpeg v0.4.8 (needed for ac3jack)
ac3jack v0.1.1
xmms-jack v0.6
qjackctl v0.2.1jackd is started with the following commandline (through qjackctl):
jackd -R -t500 -dalsa -dhw:0 -r44100 -p1024 -n2ac3jack is started with the following commandline and the output is piped through ac3dec. /usr/local/bin/ac3jack -o stdout | /usr/local/bin/ac3dec -C
After a few seconds of ac3 going on and off on my receiver it remains on and all channels are active.
Now I start playing an mp3 through xmms (with the xmms-jack plugin).
There is no sound yet but I first have to make some connections.
I use qjackctl for this:
Readable Clients: bio2jack_0
Writable Clients: ac3jack
Center
Left
LeftSurround
LFE
Right
RightSurround
I drag the bio2jack_0 to all input ports and I have sound.
Unfortunately still only left, Right, Center and LFE.
LeftSurround and RightSurround go to Left and Right and
not the back speakers for some reason.And then there's the problem of the output that can only be 48000 Khz. Since xmms won't accept 48000 when playing the mp3's (why would it, it would distort the sound) I have to run jackd with 44100 Khz so a lot of the time there are distortions in the sound because of the conversion.
In other words: It was a nice suggestion but unfortunately no luck :(
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