At disturb media we wrote a detailed tutorial on how to use the Sound and SoundMixer class in actionscript for something else, not just fancy sound visualizers.
The tutorial made it in issue 169 of WebDesigner Magazine
It's a 4 page feauture, lot's of details covered, do check it out!
Click on the image to see a demo.
The "heaps aweseome patrol captain" Chris designed the character and setup the assets,
and Alex performed and produced the sound. Big thanks !