Audio signal processing
, sometimes referred shortly to as audio processing
or just audio
, is the processing of some representation of auditory signals
, that is sound
. The representation can be digital
. An analog representation is usually electrical where the voltage level implies the pressure level (that is, the sound). Similarly, a digital representation expresses the pressure wave-form in a binary
Processing methods and application areas include such as storage, compression, transmission, enhancement (e.g., equalization, noise cancellation, echo removal or addition etc.), source separation, sound effects and computer music.