 Although the original Broadway production had used a standard pit  orchestra with Georges Bizet (qv)s orchestrations for the opera  "Carmen" slightly altered by orchestrator  Robert Russell Bennett (qv), the film score was created by  Herschel Burke Gilbert (qv), the Music Director (a term he always  insisted was the correct one, not "Musical Director), using a full  symphony orchestra (ranging from about 90 to over 105 pieces), which  enabled him to present the music with the sensibility of most of  Bizets original 1875 orchestrations as they were meant to be heard,  although modified to fit the story line and transitions of the film.  Because of Marilyn Horne (qv)s coming into the singing cast quite  late in the production, and because of a number of unrelated delays,  Gilbert had to leave the production shortly before it was completed,  as he had a commitment for an original score of another film.  Dimitri Tiomkin (qv), a Fox Studio senior, as it were, stepped in  to put together the last bits of recording and supervising the last  music editing. Technically, especially given his seniority at Fox  and his stature in the industry, he could have insisted his name be  added to the credits. Graciously, he acknowledged Gilberts  responsibility for over 95% of the work and chose to not have  himself officially credited. Given his much larger fame, his name in  the credits would have overshadowed the younger, less known  Gilberts, and would have left the impression that Gilbert was more  of an assistant, which was far from the case.