Get Funky! Effex 2.8 will have a sound node and corresponding constraints to control other framework nodes via sound amplitude and sound frequency.
Here emitted Particles are colored based on frequency in polar coordinate space (0°-180°) and temporally darkened the nearer it gets to the end of the video. At the bottom particles are killed based on frequency in cartesian coordinate space(-450cm - 450cm).
Music Credit: Clueso (Live) - Radio Hamburg