The role of a de-esser plugin in vocal processing is to reduce sibilance, which are the harsh, hissing sounds that often occur when a vocalist pronounces 's', 't', 'sh', 'ch', and 'z' sounds. Sibilance can be particularly noticeable and distracting in vocal recordings, especially after compression or EQ has been applied. A de-esser works by detecting these high-frequency sibilant sounds and then applying gain reduction to those frequencies, thereby reducing their prominence in the overall vocal ....
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