Originally Posted by spiney2:
“I am still not sure what you are trying to say. Are you claiming that surround sound is impossible on 2.0, or just that the 2 rear channels of 5.1 are never matrixed into 2.0, so that for example, 2.0 sound on freeview has no surround component ?”
“I am still not sure what you are trying to say. Are you claiming that surround sound is impossible on 2.0, or just that the 2 rear channels of 5.1 are never matrixed into 2.0, so that for example, 2.0 sound on freeview has no surround component ?”
For the last time of trying to explain it.
Two channel audio can contain surround information if specifically encoded from a multi channel master mix that contains the surround as discrete channels. The LCRS or 5.1 channels are then passed through an encoder which produces a two channel mix that a complementary decoder can process to derive a close approximation of the original discrete source channels.
If you simply sum the rear surround channels with the front channels, without any of the phase shifting that Dolby encoding uses, the result is not a surround mix as you lose the ability to separate out the two channels again.
If the original sound mix was direct to stereo then there is no surround information present by intent.
So it depends on how the two channel audio is created. If encoded from a discrete surround master then it will have surround information deliberately included.



