AW: realtime stereo to surround

["Rainer Thelonius Balthasar Straschill" <rs@moinlabs.de>]

> I have a RME FF800 that has 8outputs.  I have 5 identical cabinets 
> plus a sub. I use 5 outs to go to FrontL, FrontR, C, RearL, RearR.  My 
> Front L&R have a special crossover for the sub, so they get full 
> range, and the crossover takes care of the split.
> 
> I was able to get a DVD to play  through the RME.  After some trial 
> and error, I was able to get it to play through the correct speakers. 
> Home and computer surround processors use a special processor for 
> splitting into 5.1 , but I'm not using that.

I'd like to clear up a common misunderstanding with regard to Surround
setups. As specified by Dolby, in Dolby Sourround setups, the channels
specified before the dot are 20-20000 Hz channel used for "normal audio",
while the channels behind the dot are 3-120 Hz (I think it was 120, but am
not sure about this) "low frequency effect (LFE)" channels. That means that
in a proper setup, the front and rear channels go all the way down for 
music
applications while the .1 channel is only used for airplanes starting, cars
exploding, death stars detonating etc.

Depending on your speaker setup, it might actually make sense to feed a 
part
of their signal to the sub as well.

But playing back DVD audio (coded as 5.1) and having it go to the correct
speakers would mean connecting all six speakers to your Fireface.

        Rainer