film score may not have been composed yet). The music used in the trailer may be: Music from the score of other movies. Popular or well-known music, often chosen for its tone, appropriateness of a lyric or lack thereof, or recognizability. The most often used of these is O Fortuna from Carmina Burana by Carl Orff, as well as the works of E.S. Posthumus and Beethoven. Popular music may be selected for its tone (i.e. hard rock for an action film, lighter pop for a romantic comedy), or to establish context (e.g. the trailer for a film set in the 1940s might use big band swing). "Library" music previously composed specifically to be used in advertising by an independent composer. There are many trailer music library companies which produce trailer music, some of the best known are audiomachine, Two Steps From Hell, Immediate Music and X-Ray Dog or SFX and Music libraries like the ones from Moss Landing, Gerrit Kinkel Productions or RedCola Music. Specially composed music. One of the most famous Hollywood trailer music composers, credited with creating the musical voice of contemporary trailers, is John Beal, who began scoring trailers in the 1970s and, in the course of a thirty-year career, created original music for over 2,000 film trailer projects, including 40 of the top-grossing films of all time, such as Star Wars, Forrest Gump, Titanic, Aladdin, Braveheart, Ghost, The Last Samurai and The Matrix. A cast run is a list of the stars that appear in the movie. If the director or producer is well-known or has made other popular movies, they often warrant a mention as well. Most trailers conclude with a billing block, which is a list of the principal cast and crew. It is the same list that appears on posters and print publicity materials, and also usually appears on-screen at the beginning (or end) of the movie. Studio production logos are usually featured near the beginning of the trailer. Until the late 1970s, they were put only at the end of the trailer or not used at all; however, Paramount Pictures was the first studio to use its actual studio logo at the beginning of its trailers in the 1940s. Often there will be logos for both the production company and distributor of the film. Many trailers are mixed in Dolby Digital or any other multichannel sound mix. Scenes including sound effects and