You are correct that the 1st XANADU release was 16x9, but was an older transfer. I'll revise my post to reflect this. The 1st release has 4.0 audio, while the second release has 5.1 audio. The original 4.0 mix didn't have the surround track continually active, when when the surrounds are active - they are certainly noticed. The new 5.1 mix pulls more front info to the back which in turn now sounds smeared and not as distinct, and many of the songs now sound different. If you get a chance, check out the latest DVD release which may be available at a local library if you want to compare. We need the first DVDs audio muxed with the 2nd DVDs video.