Dynamics processor

A dynamics processor is an effects device or plug-in that influences the volume of a signal. In analog devices this is implemented with a VCA and an envelope follower. Dynamics processors are mainly used in sound engineering .

There are four types with different functions: the limiter , the compressor , the expander and the gate . Most of the time, the compressor and limiter are built into a common effects device. Professional dynamics processors offer all four functions together. Professionally, a distinction is made between the functions of upward and downward , depending on whether the signal components are influenced above or below the set threshold value. In general, an expander works with a ratio (input / output ratio) <1, a compressor with a ratio> 1, whereas a limiter works with ratios of 10 or higher. Expander and gates often have a range parameter for setting the maximum level swing and a hold parameter for defining the working hysteresis. Dynamics processors can be built in series or in parallel, work in multiband configuration (mastering) or be frequency-selective (de-esser).

literature

• Roland Enders: The home recording manual. 3rd edition, Carstensen Verlag, Munich, 2003, ISBN 3-910098-25-8