Opera house electronic libretto systems have begun to be used in some opera houses, including New York's Metropolitan Opera, Milan's La Scala, and the Crosby Theatre of The Santa Fe Opera, which provide two lines of text on individual screens attached to the backs of the seats so as to not interfere with the visual aspects of the performance. A subtle type of sound reinforcement called acoustic enhancement is used in some opera houses. Acoustic enhancement systems help give a more even sound in the hall and prevent "dead spots" in the audience seating area by "...augment[ing] a hall's intrinsic acoustic characteristics."
Central City Opera House Central City Opera House The Central City Opera House is located in the Central City/Black Hawk Historic District in Central City, Colorado, United States. It was constructed in 1878. It has offered operatic and theatrical productions that drew prominent actors and performers in the late 19th-century, and in the early 20th-century it was a motion picture theatre. The opera house was designated to the National Register of Historic Places in 1973. In 1877, the citizens of Central City formed the Gilpin County Opera House Association to fundraise for the state's first opera house. Denver architect Robert S. Roeschlaub designed the