Angry Bots Audio Implementation

Hi there, I'm writing my bachelor thesis on the implementation of my self-composed adaptive music into angry bots. My Unity version is 4.1.2f1. The way I implement the music is that I attach certain loops to certain objects (such as a enemy). But I want to implement a clue loop to the computerstation that you have to shoot to open the locked doors. How do I stop that loop after the computerstation got hit by a shot to unlock the attached door? Thanks, Chrizzee