Audio Glossary
Mixing
WHAT IS
DE-ESSER?
A de-esser is a frequency-specific compressor that tames harsh sibilance — the 's', 't', 'sh', and 'f' sounds in vocals that spike in the 5-10 kHz range. It reacts only when those frequencies get too loud, smoothing them without dulling the rest of the vocal. Uncontrolled sibilance is one of the fastest tells of an amateur vocal mix.
Controlling sibilance without a lisp
Bright vocals and modern top-end processing push sibilance forward, and once it's harsh it fatigues the listener fast. A de-esser watches a narrow band (usually 5-9 kHz for most voices) and only clamps down when the 'ess' sounds spike, leaving the body of the vocal untouched.
The mistake is over-de-essing until the vocal lisps or goes dull. Set the threshold so it only catches the worst peaks, and target the specific frequency where the harshness lives rather than the whole top end. On vocal mixes this is standard — a controlled vocal sits in the mix instead of stabbing over it.
Quick answers
DE-ESSER FAQ.
What frequency should a de-esser target?
Sibilance usually lives between 5 and 10 kHz — around 5-7 kHz for deeper voices and 7-9 kHz for brighter ones. Sweep to find the exact frequency where the 'ess' sounds are harshest, and target that band specifically.
Why does my vocal sound harsh?
Usually uncontrolled sibilance — the 's' and 't' sounds spiking in the high frequencies. A de-esser tames those spikes without dulling the whole vocal. It's one of the biggest differences between an amateur and a professional vocal mix.
Related terms
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