The first film to be originally recorded, mixed and mastered in pure digital sound, similar to a compact Disc with DDD sound. 'Fantasia (1940)' was also re-recorded in digital audio in 1982 and presented in digital sound in 1985 in two theatres in the US, but that was a dual system with the sound being on a special VHS tape and synchronized with the picture.
During Jason's flashback of his arrival at the hospital after a car crash, a loudspeaker is heard calling "Dr. Stahl and Dr. Gee to psychiatrics". This is almost certainly a reference to Eric Steven Stahl and Gerald Laurence (a.k.a. G-man), the movie's writers.