PDB said:It appears the mono on the new 4K BD is a downmix (according to people on blu-ray.com)

I read that too but have been waiting for someone I trust here to verify it. If true, it's a real shame: even though a lossless track would have been preferable, DD 1.0 at 192kbps would have been more or less transparent to the source.

Re: the mono

I'm not working on it at the moment. Syncing without a visual guide would be a new thing for me, so perhaps someone here might handle the mono. In the first instance, I planned to make a synced English DTS-HD MA 5.1 track, which could be used as a guide track for the mono.

At the moment, everything apart from the script that I mentioned above is just an idea though.