Since there is almost NO info on the .aue file format other than some random Bluetooth ramblings the answers will probably stay hidden for now.
I couldn't really distinguish whether it was embedding or encryption that was used since code and I.P. are not things I'm fluent in.
A lot has changed since "digital cinema" started taking over as the dominant force in movie theaters too.....server based automation, scheduling, A/V presentation....it's a far different animal now.
Info I'm looking for is on stuff already 7 years old, if not a bit older. Those who may know are either unable to discuss it openly or unwilling to discuss it privately....either way, patience is the better part of valor at this point methinks.