Audio signal processing, sometimes referred to as audio processing, is the processing of a representation of
auditory signals, or
sound. The representation can be
digital or
analog.The focus in audio signal processing is most typically a mathematical analysis of which parts of the signal are audible. For example, a signal can be modified for different purposes such that the modification is controlled in the auditory domain.The parts of the signal are heard and which are not, is not decided merely by
physiology of the
human hearing system, but very much by
psychological properties. These properties are analysed within the field of
psychoacoustics.
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