Quantization

Generally, quantization is the state of being constrained to a set of discrete values, rather than varying continuously.
In signal processing, quantization is the process of approximating a continuous signal by a set of discrete symbols or integer values.
In physics, quantization is either the taking of discrete rather than continuous values for some physical quantities; or the procedure to construct a quantum theory from its classical limit.
In music software, quantisation is the altering of the times and durations of notes so they fit the beat or subbeat perfectly.

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