Logitech z906, what are the Stereo modes are for? How to get most out of it?

[keavlar]

Hey guys.

Can someone please explain about the Stereo modes: 3D, 4.1 - what they used for. (I know what each does, but what they used for? I was sure for movies. )

But when watching movies all kind, even Blueray, on 3D mode, and others I dont hear the voices, so If I should guess, its only for music ?

 

Can some one please correct me. 

 

[exhaustedbrit]

Probably a stereo fill, where the L and R channels are repeated in the rear channels. If you don't hear the voice that's probably because with a 5.1 output voice comes from the centre channel which is lost when using a stereo fill strategy, centre should ideally be disabled or become L+R.

So it's for stereo audio sources where you want to actually utilise though three other satellites.

[keavlar]

4 minutes ago, exhaustedbrit said:

Probably a stereo fill, where the L and R channels are repeated in the rear channels. If you don't hear the voice that's probably because with a 5.1 output voice comes from the centre channel which is lost when using a stereo fill strategy, centre should ideally be disabled or become L+R.

So it's for stereo audio sources where you want to actually utilise though three other satellites.

So when watching movies, i should disable modes?
I mean, when they said its for THX movies, to get out of it, it was meant with out the modes active?