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."
La Scala Theatre Ballet School Among them: Attilia Radice, Giuseppina Morlacchi, Teresa Legnani, Cia Fornaroli, Ettorina Mazzucchelli, Nives Poli, Edda Martignoni, Bianca Gallizia, Giuliana Penzi and Elide Bonagiunta. In more recent times, famous dancers who have studied at the school are: Carla Fracci, Luciana Savignano, Liliana Cosi, Oriella Dorella, Paola Cantalupo, Marco Pierin, Massimo Murru, Carlotta Zamparo, Sabrina Brazzo, Gilda Gelati, Marta Romagna, Roberto Bolle, and Alessio Carbone. Many other dancers have started their dance instruction at the school, such as the famous "ballerina" Alessandra Ferri. La Scala Theatre Ballet School La Scala Theatre Ballet School () is one of the leading classical ballet schools