Quote Originally Posted by woodman
OK ... now I understand the confusion. Yamaha is simply making use of the THX certification (which they've always met, but refused to pay for) as a way to differntiate DD-Surround-EX (so called 6.1 mode) from the more prolific DD-5.1 surround mode that is the standard surround mode in use for HDTV television broadcasting and DVDs.

But in the final analysis, I stand by my previous comment that THX is not a surround sound format at all, but merely a performance certification. Yamaha has always qualified for such certification, but refused to pay LucasFilm their "pound-of-flesh" for the right to put the logo on their equipment. Now, with competition in the A/V receiver marketplace heating up and getting hotter than ever, they've caved in and paid for the right to use the THX logo. As long as they've done that, they're making use of the THX name to try and put forth the idea that it's worth more than it actually is.

OK, I am starting to pick up what your laying down. But, I think (I am at work right now) my receiver has both a DDEX and the THX mode. What's the difference then. They do sound different. I thought after reading the article I linked earlier DDEX and THX surround EX are the same thing. Bare with me, it's starting to sink in.

JSE