Beat Assistant v1.2 - Detect the bpm (beats per minute) of wav, mp3 and aif files and use it to generate markers or keyframes and to stagger layers.
Did you ever work on an animation that involved something called MUSIC? Its this by-product that comes out of your speakers while the video is playing.
If you treat music in your videos as first-class citizens, beat assistant is a tool for you. It automatically detects the beats per minute of your music and allows you to do lots of things with it.