today we released a new After Effects tool: Beat Assistant.
It can detect the beats per minute (bpm) of mp3, wav and aif files in your composition and generate markers or keyframes according to the beat. You can also stagger layers, e.g. to make a new layer appear with each beat. A nice feature is that you don't need expressions to create your animations. You can directly generate keyframes for position, scale, rotation or any other effect parameters and even colors.
more infos about Beat Assistant: After Effects tool Beat Assistant
Beat Assistant in 1 Minute
Tutorial: Getting started with Beat Assistant
If you do a bunch of cutting to sync points or beats this is a great tool. I've used it and loved it. It saved a boatload of time.