What is that movie! (It involves a conductor, murder, and masks.. ring a bell?)?

Ok.


So I saw this movie on TV a LONG time ago. I think it was filmed in the 80's. The part I saw was with a music conductor imagining how he was going to murder this girl and frame another guy. His whole plot was to go buy some masks off some people, knock the guy out, take his mask and kill the girl in front of a camera, then switch back masks and act sad. Ring any bells? I cannot remember what it was called..What is that movie! (It involves a conductor, murder, and masks.. ring a bell?)?
It very well might be ';Unfaithfully Yours';





http://www.imdb.com/title/tt0088326/