This review is for Live Trax 40 Blu-Ray I own a sony UBP-x800m2 and full 5.2 audio setup. I bought 40 and 44 specifically for the Blu-Ray with 5.1 mixes, so audio is my primary focus. I wrote the 44 review first, so I will compare 40 to 44. I haven't watched the full discs, but have skipped around here & there. Tech Specs: Video 1080i (upscaled from SD) Audio 1: LPCM 2ch 48/24, 2.3 Mbps Audio 2: DTS-HD Master Audio 5.1ch 48kHz, ~5Mbps 18 songs, runtime 2:05:25 5.1 and Stereo mix by Rob Evans Menus are good, like the popup menu - easy to switch between songs while watching. Zero extras. The disc opens with a note that 'the SD footage has been converted to HD for a superior listening experience.' I'm glad it's on Blu-Ray, for a higher audio quality (lossless FTW) and to avoid switching discs. The video is definitely lower quality, it looks SD. The aspect ratio is a bit wider than 4:3. Stereo mix is good. Surround mix is very good overall. Surrounds are much less present compared to Live Trax #44. They're still there, but quieter. They perk up between songs. I prefer 44 always surrounding me in the crowd. The center is less discrete, but still well-used. The LR panning is nice. Again low end is just where I'd expect. I did hear some vocal effects at the start of Too Much! That's preferrable compared to 44's zero vocal effects. I only listened to a couple songs, there's never enough time...