That's BS. There was a bug and I fell prey to it way back when. *SOMEWHERE* in this thread is the solution to making it all wake up properly. I don't remember exactly but I believe it was one of those hold these three buttons down while powering up and the entire projector goes back to default settings which allows it to operate and upgrade the firmware!!
Virtually impossible with a closed loop analysis system using swept bandpass filters! There is nothing a broadband SPL meter can do better except, perhaps, measure redundant reflected energy off the walls and ceilings.