in the silents for nearly four decades. Inter-titles As motion pictures gradually increased in running time, a replacement was needed for the in-house interpreter who would explain parts of the film to the audience. Because silent films had no synchronized sound for dialogue, onscreen inter-titles were used to narrate story points, present key dialogue and sometimes even comment on the action for the audience. The title writer became a key professional in silent film and was often separate from the scenario writer who created the story. Inter-titles (or titles as they were generally called at the time) "often were graphic elements themselves, featuring illustrations or abstract decorations that commented on the action". Live music and other sound accompaniment Showings of silent films almost always featured live music starting with the first public projection of movies by the Lumière brothers on December 28, 1895, in Paris. This was furthered in 1896 by the first motion-picture exhibition in the United States at Koster and Bial's Music Hall in New York City. At this event, Edison set the precedent that all exhibitions should be accompanied by an orchestra. From the beginning, music was recognized as essential, contributing atmosphere, and giving the audience vital emotional cues. Musicians sometimes played on film sets during shooting for similar reasons. However, depending on the size of the exhibition site, musical accompaniment could drastically change in scale. Small town and neighborhood movie theatres usually had a pianist. Beginning in the mid-1910s, large city theaters tended to have organists or ensembles of musicians. Massive theatre organs, which were designed to fill a gap between a simple piano soloist and a larger orchestra, had a wide range of special effects. Theatrical organs such as the famous "Mighty Wurlitzer" could simulate some orchestral sounds along with a number of percussion effects such as bass drums and cymbals, and sound effects ranging from "train and boat whistles [to] car horns and bird whistles; ... some could even simulate pistol shots, ringing phones, the sound of surf, horses' hooves, smashing pottery, [and] thunder and rain". Musical scores for early silent films were either improvised or compiled of classical or theatrical repertory music. Once full features became commonplace, however, music was compiled from photoplay music by the pianist, organist, orchestra conductor or the movie studio itself, which included a cue sheet with the film. These sheets were often lengthy, with detailed notes about effects