Most silent films are poorly preserved, leading to their deterioration, and well-preserved films are often played back at the wrong speed or suffer from censorship cuts and missing frames and scenes, giving the appearance of poor editing. Many silent films exist only in second- or third-generation copies, often made from already damaged and neglected film stock. Another widely held misconception is that silent films lacked color. In fact, color was far more prevalent in silent films than in the first few decades of sound films. By the early 1920s, 80 per cent of movies could be seen in some sort of color, usually in the form of film tinting or toning or even hand coloring, but also with fairly natural two-color processes such as Kinemacolor and Technicolor. Traditional colorization processes ceased with the adoption of sound-on-film technology. Traditional film colorization, all of which involved the use of dyes in some form, interfered with the high resolution required for built-in recorded sound, and were therefore abandoned. The innovative three-strip technicolor process introduced in the mid-30s was costly and fraught with limitations, and color would not have the same prevalence in film as it did in the silents for nearly four decades. 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 intertitles 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. Intertitles (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". Showings of silent films almost always featured live music, starting with the guitarist, at 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.