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."
City Opera House (Traverse City, Michigan) City Opera House (Traverse City, Michigan) The City Opera House is located at 106-112 Front Street in Traverse City, Michigan. It was designated a Michigan State Historic Site in 1971 and listed on the National Register of Historic Places in 1972. In 1891, entrepreneurs Perry Hannah, Charles Wilhelm, Tony Bartok, and Frank Votruba owned the property where the opera house now stands. They hired architect E. R. Prall of Pontiac, Michigan to design this structure, and builder John Wilhelm to construct it. At the time of construction, it was the first building in Traverse City to use electric lights. The