I did some tests with letting Sound Keys control Mir that came out pretty cool.
Download AE CS6 AEP: AudioMir.aep
Download AE CS5.5 AEP: AudioMir_CS55.aep
Procedural audio reactive animation.
Quick test using Trapcode Sound Keys controlling Mir to generate visuals from audio.
In this case, three expressions are used on Mir:
Rotate Y = time*20;
Amplitude = 200+thisComp.layer("SK").effect("Sound Keys")("Output 1");
Frequency = 200+thisComp.layer("SK").effect("Sound Keys")("Output 3");
Where SK is the sound keys layer and Output one is setup to capture bass and Output 3 is setup to capture the high frequencies. An invert effect was manually inserted.
Music: "Fortress" by -ono- (freemusicarchive.org/music/ono/document_of_life/06_Fortress)
Some loveley experiments with Trapcode Particular by Andrew Kramer of Video Copilot. Downloadable AE projects included! These are pretty render-heavy.
Download the AE projects here: http://www.videocopilot.net/blog/2013/03/particle-experiments-project/