S1 De-Esser

The deal

$17.97 at KVR Marketplace (down from $29.95). The sale runs through October 11, 2026.

What it is

S1 De-Esser is a de-essing effect plugin from Parish Audio that tames harsh S, SH, and T sounds. Instead of darkening the whole track, it reacts only when sibilance gets too prominent and reduces just the affected region, leaving the rest of the performance intact.

Who it's for

Vocal producers, mixing engineers, and podcast or dialogue editors who need to smooth sibilance on sung vocals and spoken word without dulling the top end.

Key features

• Frequency targeting lets you home in on the exact sibilance problem area
• Adjustable processing breadth and reduction limits keep the effect transparent
• Attack, release, and mix controls allow fine tuning
• A dedicated Monitor function lets you hear exactly what is being removed, and a reduction display shows the processing in real time
• It ships in VST3 and Audio Unit formats for macOS and Windows, with Universal 2 binary support on Mac