Is there a way to control sound like this?

[video=youtube_share;WyYoyvNfuTI]http://youtu.be/WyYoyvNfuTI?t=45s[/video]

What I’m looking to do is make a virtual siren controller just like this one. What I was curious about, is if there’s a way to control the siren the way it was being used from the 45 second mark until the 58 second mark. I’m not very advanced when it comes to flash (this is a bit of a hobby thing) so I was just wondering if this is even possible. If it is, any help on where to get started would be great.