Chapter 18

Dynamic Range ProcessorsCompressors and Expanders

18.1 Introduction: Dynamic Range Processors

This chapter introduces another category of audio effects. These processors change the amplitude of a signal, influencing the signal’s dynamic range. By definition, dynamic range is the difference between the maximum and minimum amplitude of a signal or system.

Examples of dynamic range (DR) processors include compressors and expanders. Additionally, a specific type of compressor, with a distinguishing name, is the limiter. Similarly, a gate is a specific type of expander.

18.1.1 Basics of Amplitude Processing

At a fundamental level, each dynamic range processor is an amplitude processor with additional features. Therefore, the actual processing ...

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