BYOD Captioning
From Adler Planetarium, via Dome-L, an open source approach to captioning/subtitling in the dome. Guests can, using their own mobile device, access a web page that displays lines of text at the appropriate time intervals.
A ‘start’ button has to be pressed in time with the beginning of the show. i bet some playback systems, could, with some work, play back text to a web page right in time with the show.