@audio/dynamics-deesser

De-esser: bandpass sidechain (sibilance band) drives a compressor whose gain

npm install @audio/dynamics-deesser

import deesser from '@audio/dynamics-deesser'

Sibilance reduction, two architectures behind mode: broadband (default) — a biquad bandpass drives the envelope follower and the gain reduction is applied broadband; simple and transparent. band — an HP-filtered sidechain drives a dynamic peaking EQ at freq, so only the sibilance band is cut and program below it stays untouched even during deep reduction (wideband/split-band precedent).

import { deesser } from '@audio/dynamics'

deesser(data, { freq: 6500, threshold: -20 })
deesser(data, { freq: 5500, q: 3, threshold: -24, ratio: 6 })
deesser(data, { mode: 'band', freq: 7000, threshold: -30, ratio: 8 })

| Param | Default | | |---|---|---| | mode | 'broadband' | 'broadband' | 'band' | | freq | 6500 | Hz, sibilance center | | q | 2 | bandpass Q (broadband) / 1.4 peaking-cut Q (band) | | threshold | -20 | dB (on sidechain level) | | ratio | 4 | — | | knee | 6 | dB (broadband only) | | attack | 1 | ms | | release | 40 | ms |

Use when: harsh 's' / 't' / 'sh' in close-miked voice, bright vocal takes; mode: 'band' when the voice sits with program that must not pump. Not for: broadband brightness — use an EQ. Generic compression — use compressor.

Part of @audio/dynamics — the dynamics family umbrella. This README is generated from the umbrella docs.

MIT © audiojs