[MPlayer-users] Creating 6.1 sound from 5.1 source.

[Marc MERLIN]

On Sun, Apr 14, 2013 at 02:03:33PM +0200, Nicolas George wrote:
> Le quartidi 24 germinal, an CCXXI, Marc MERLIN a écrit :
> > I have a 6.1 speaker setup (4 and 5 are left and right, and 6 is full rear).
> > 
> > When I have 5.1 input, either as ac3 or dts, my receiver (Denon 3808) is not
> > smart enough to make a virtual 6th channel and use my rear speaker.
> 
> Are you sure you want that? A lot of systems do that kind of thing (for
> example the upmix ALSA plugin, or the default stereo -> 5.1 conversion), but
> I have decided for myself this is not a good idea: mixing the left and right
> channels for the center speaker will only reduce the contrast between left
> and right.
 
Note that I'm talking about left/right and center in the rear, not the
front.
It doesn't change what you said, but typically the left/right (speaker
4-5) channels are less complex, and combining 50% of each into the back
channel #6 likely wouldn't be so bad.

> Maybe something better could be done by decomposing left and right into a
> common part and two distinct parts, but this is way more complex.

Yes, I thought about that too, and indeed it's more complex.
Turns out DTS NEO:x does that in the receiver, but mine, even though it
was a top of the line $1500 Denon 3808, does not support that.

Marc
-- 
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Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/