Dither is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as "banding" (stepwise rendering of smooth gradations in brightness or hue) in images, or noise at discrete frequencies in an audio recording, that are more objectionable than uncorrelated noise. Dither is routinely used in processing of both digital audio and digital video data, and is often one of the last stages of audio production to compact disc.

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