Editing Audio signal processing (section)

{{short description|Electronic manipulation of audio signals}}
{{Redirect|Audio processor|audio processing chips|Sound chip}}
{{More citations needed|date=June 2021}}

'''Audio signal processing''' is a subfield of [[signal processing]] that is concerned with the electronic manipulation of [[audio signal]]s. Audio signals are electronic representations of [[sound wave]]s—[[longitudinal wave]]s which travel through air, consisting of compressions and rarefactions. The energy contained in audio signals or [[sound power level]] is typically measured in [[decibel]]s.  As audio signals may be represented in either [[Digital signal (signal processing)|digital]] or [[analog signal|analog]] format, processing may occur in either domain.  Analog processors operate directly on the electrical signal, while digital processors operate mathematically on its digital representation.