Opera, also known as Terror at the Opera, is a 1987 Italian giallo horror film written and directed by Dario Argento and starring Cristina Marsillach, Urbano Barberini and Ian Charleson. The film's score was composed by Brian Eno and Claudio Simonetti. The film was released in the United States under the title Terror at the Opera. The film was one of Argento's most commercially successful films, seeing 1,363,912 ticket sales in his native country of Italy. This is the second Dario Argento's horror film to have THX audio certified and picture quality.
(Summary from Wikipedia)