Ennio Morricone
I'm sad Ennio Morricone ended his collaborations with Dario argento after this movie (until 1996 anyway), although that opened the door for Claudio Simonetti.
But what an amazing last score Morricone composed for him! I'm listening to it now, and the track playing when Nina dies - called 'Come Un Madrigale' - is a beautiful piece of music. I've listened to so many scores by Morricone I don't expect to find something this good by him often.
This world is a comedy to those that think, a tragedy to those that feel.