Alright, hang with me here... I have a Yamaha HTR-5760 and I understand most of the indicator lights for input channels. Obviously, if it's Dolby Digital, it's Dolby Digital. If it's DTS, it's DTS. If I use Pro Logic, it does a little extra encoding. If I use Pro Logic II, it encodes it to fill the 6 and 7 channels. Etc. However, what I'm a bit confused on is my input channel indicator. When I play something that is Dolby Digital 5.1 or DTS 5.1, it looks like this: When I play the only thing I have that is DTS 6.1 (Lord of the Rings EE), it looks like this: However, when I play any of the new Star Wars Original Trilogy movies, I also get this: But the Star Wars Setup screens and box information says it's Dolby Digital 5.1 EX. Correct me if I'm wrong here, but if it's including a Surround Back (SB) channel, isn't this 6.1? And obviously, when something finally comes out in 7.1 it will include the SBL | SBR channel, but my receiver will be sort of outdated in that it won't indicate anything but a SB channel. Is EX just a fancy way of saying 6.1 so not to confuse the consumer who only has a 5.1 system into not buying it because they think they won't be able to play it? Anyone that can help me clean up this mess in my brain concerning 6.1, 7.1, and all this ES and EX stuff would be surely appreciated. Also, I've looked elsewhere for explanations and they sometimes just confuse me more. All of us around here seem to be able to explain things better than Dolby themselves can!!