What is a Dynamics Processor? (video)
Dynamics processors are little more than automatic volume controls, responding to changes in signal level over time. If the input signal’s level meets a specific criteria (threshold) then the processor reacts by changing the output signal level in a prescribed way (turns it down, turns it up, etc). Here’s another clip from my new Lynda.com title Foundations of Audio: Compression and Dynamic Processing. Check it out.