Editing Audio signal processing (section)

=== Analog ===
{{further|Analog signal processing}}

An analog audio signal is a continuous signal represented by an electrical voltage or current that is ''analogous'' to the sound waves in the air. Analog signal processing then involves physically altering the continuous signal by changing the voltage or current or charge via [[electrical circuits]].

Historically, before the advent of widespread [[digital electronics|digital technology]], analog was the only method by which to manipulate a signal. Since that time, as computers and software have become more capable and affordable, digital signal processing has become the method of choice. However, in music applications, analog technology is often still desirable as it often produces [[Nonlinear system|nonlinear responses]] that are difficult to replicate with digital filters.