"The most influential element in Jerry Goldsmith's score for The Omen is the use of chorus. These days no self-respecting movie studio puts out a horror movie trailer without music featuring a 'demonic' choir (usually Carl Orff's 'O Fortuna'). The Omen arguably established that tradition with 'Ave Satani.' Somehow, nothing sounds as sinister as a brooding male and female choir chanting in Latin over a dark, minor key dirge.... Interestingly, the composer noted that his initial ideas for the score stemmed from 'hearing voices.'"
– from Chapter 6: A Fearful Earful of Kristopher Spencer’s Film and Television Scores, 1950-1979