Thanks for posting that... and welcome to the board !
Every time I saw a post recommending using the surround back speakers instead of the surrounds for music I had a nagging moment of "but how are they actually going to DO that" doubt. I was visualizing some kind of speaker switching box and wondering why nobody made such a best...
... but now it all makes sense. I had forgotten that we use different inputs for music vs. HT, so the signal flipping can be done with the 5.1 analog connections. Now I have to go out and get that 5.1 cable I have been putting off for a few months, hate spending that much $$ on a stinkin' cable