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Recording and Producing Audio for Media by Stanley R. Alten

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Chapter 8. Signal Processors

Signal processors are devices used to alter some characteristic of a sound. Generally, they can be grouped into four categories: spectrum processors, time processors, amplitude processors, and noise processors. A spectrum processor, such as the equalizer, affects the spectral balances in a signal. A time processor, such as a reverberation or delay device, affects the time interval between a signal and its repetition(s). An amplitude processor (or dynamic processor), such as the compressor-limiter, affects a signal’s dynamic range. A noise processor does not alter a signal so much as it makes the signal clearer by reducing various types of noise.

Some signal processors can belong to more than one category. For example, ...

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