From the introduction:
This is the scenario Deranged. In the following pages you will find the main scenario text presenting the thoughts behind the scenario, a practical guide for conducting it, material for the participants and everything you will need to conduct the scenario. But before you read any further, you should know that Deranged is a scenario about a group of people who created wonderful music. This music is the very core of this scenario. When you run this game, you are the scenographer and conductor of the piece, and your most important tool and effect is music.
The game document includes numerous links to a variety of external musical sources. Some links require specific (common) software to utilize. Play involves listening to numerous musical "soundtrack" entries.