Scroll panel help

Hi there, I am in a unique situation where my work requires SL, and Rise is not allowed... Is it possible to have a scrolling panel and have audio Trigger when a user reaches a certain point in the panel? Aside from a hot spot, I am at a loss for how to accomplish this objective.

Also, is there a way to create an automated scroll effect like this without using Javascript? I think I would have to use a significant number of motion paths to achieve the same effect which is not ideal.