Wave Arts MultiDynamics 6 Dynamics Processor Plug-in (Software Download)

MultiDynamics is a powerful multi-band dynamics processor useful for mastering, track  processing, sound design and noise reduction. MultiDynamics provides  up to six bands with independent compression or expansion per band. MultiDynamics has an elegant and ingenious user interface that makes it easy to edit bands and to visualize and hear what is happening. Multiband dynamics processing combines the techniques of equalization and single band dynamics processing.  

A simple application of multiband dynamics is to apply compression or expansion to a specific frequency range.
It is also possible to think of multiband dynamics as applying equalization which is dependent on the level of the input sound. So one can set up an EQ curve for low volumes and set another EQ curve for high volumes.

Another use of multiband dynamics is noise reduction. One can set up multiple bands to do noise gating by setting the gain to decrease when the signal falls below threshold. Also, multiband dynamics applied to solo instrument sounds can be used for sound design. It is possible to split up the sound into different frequency ranges, apply compression to some and expansion to others.