Awesome. This is indeed the fake stereo mix by Chace as mentioned. You can clearly hear the audio is widened left and right instead of being pure center as mono should be, plus it sounds like some additional sounds are layered on top of it in instances.

It would be awesome if you could make available a capture with the image, so that one can sync the audio back to the Blu-ray and pitch it back at the correct speed, it would be cool to have this weird mix preserved forever. It's part of Terminator history.