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."
Faust (opera) a three-act revision. It is also possible that the 1861 Dresden title change was out of respect for Spohr's close and long association with the city. The opera was given for the first time in Italy at La Scala in 1862 and in England at Her Majesty’s Theatre, London (in Italian) in 1863. In 1864, when the opera was given at the same venue in English, Gounod took a theme from the prelude to the opera and wrote a new aria for the star baritone Charles Santley in the role of Valentin, 'Even bravest heart may swell' (with words by