Dynamic range compression
AUDIO SIGNAL PROCESSING OPERATION THAT REDUCES THE VOLUME OF LOUD SOUNDS OR AMPLIFIES QUIET SOUNDS THUS REDUCING OR COMPRESSING AN AUDIO SIGNAL'S DYNAMIC RANGE
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Dynamic range compression (DRC) or simply compression is an audio signal processing operation that reduces the volume of loud sounds or amplifies quiet sounds, thus reducing or compressing an audio signal's dynamic range. Compression is commonly used in sound recording and reproduction, broadcasting, live sound reinforcement and in some instrument amplifiers.