De-esser
Definition
A frequency-specific compressor designed to reduce harsh sibilance — the "s," "sh," and "t" sounds — in vocal recordings. Targets a narrow high-frequency band and applies gain reduction only when that band is triggered.
In Simple Terms
A tool that tames harsh "s" and "sh" sounds in vocals without dulling the whole voice. It only acts when those specific sharp frequencies appear, leaving everything else untouched.