Editing Audio signal processing (section)

=== Digital ===
{{further|Digital signal processing}}

A digital representation expresses the audio waveform as a sequence of symbols, usually [[binary numbers]].  This permits signal processing using [[digital circuits]] such as [[digital signal processor]]s, [[microprocessor]]s and general-purpose computers.  Most modern audio systems use a digital approach as the techniques of digital signal processing are much more powerful and efficient than analog domain signal processing.<ref>{{Cite book |title=Digital Audio Signal Processing |first=Udo |last=Zölzer |publisher=John Wiley and Sons |year=1997 |isbn=0-471-97226-6}}</ref>