I was always thinking that broadcasting high pitched audio signals would be an awesome way to drive a companion website in a theater or museum. As you follow the play subtitles advance or text for a painting comes up on your phone.
I’ve been wanting theaters to adapt a protocol like this to control the color of light sources in the theater (row lights, emergency exit sign). Make all those lights with color leds and let the color be controlled by signal embedded in the audio track of the movie — then subtle mood lighting effects would become an option for movie makers... would be fun for some movies — the stars wars scene in the emperor’s thrown room comes to mind as a good example.
Maybe the law is very specific in the color and amount of light that emergency signs and row lights are allowed to have?
I'm just speculating, but I don't remember the last time I saw a non-green exit sign. I think I've seen them red but very seldomly.
Could that be something preveting such innovations?
I do agree however that it would probably be cool. Sometime ago I got a lightpack (I think it was called?) from a kickstart project, that had a similar effect but for your tv of computer monitor and it looked great.
Now that I think about it, I do have seen red ones in Canada and the US.
In any case, it seems that it's a color chosen to comply with some law, instead of just an arbitrary choice. In that sense I'm not sure if regulations would let movie theaters (or other businesses) change the color.
