What Actually Happens When 5.1 Is Played On A 7.1 System?
Just added a couple more speakers to my 2009 Sony STR-DA5400ES amp that was limited to 5.1 for many years, so that now I've got a true 7.1 system.
I have to say 7.1 Blu-rays are very much better than the same Blu-rays playing back as 5.1.
Question for geeks: what officially happens when I go the other way?
What happens when I play a 5.1 Blu-ray back on my 7.1 system? Does the amp simply duplicate the 5.1 surrounds into the 7.1's rear surrounds? Synthesize something else? Ignore the rear surrounds?