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 history in general. La Scala also hosts the Accademia d'Arti e Mestieri dello Spettacolo (Academy for the Performing Arts). Its goal is to train a new generation of young musicians, technical staff, and dancers (at the Scuola di Ballo del Teatro alla Scala, one of the Academy's divisions). A fire destroyed the previous theatre, the Teatro Regio Ducale, on 25 February 1776, after a carnival gala. A group of ninety wealthy Milanese, who owned private boxes in the theatre, wrote to Archduke Ferdinand of Austria-Este asking for a new theatre and a provisional one to be used while completing the