@audio/eq-baxandall

Baxandall tone control — bass/treble shelving with reciprocal characteristics

npm install @audio/eq-baxandall

import baxandall from '@audio/eq-baxandall'

The canonical two-knob tone control found in amplifiers, mixers, and guitar pedals — a low-shelf at fBass and a high-shelf at fTreble (both fixed Q 0.707), cascaded. Each shelf tracks its own frequency/gain/fs independently, so bass and treble move without disturbing each other.

let params = { bass: 3, treble: -2, fs: 44100 }
for (let buf of stream) baxandall(buf, params)

| Param | Default | | |---|---|---| | bass | 0 | Bass shelf gain, dB (positive boosts, negative cuts) | | treble | 0 | Treble shelf gain, dB (positive boosts, negative cuts) | | fBass | 250 | Bass shelf corner frequency, Hz | | fTreble | 4000 | Treble shelf corner frequency, Hz | | fs | 44100 | Sample rate, Hz |

Pass the same params object across successive calls — both shelves' coefficients and filter memory are cached on it and only rebuilt when their own gain/frequency/fs change, so state carries across block boundaries automatically.

Use when: a simple two-knob tone stack — mixer channel strip, guitar amp voicing, quick "warmer/brighter" macro control.

Part of @audio/eq — the eq family umbrella.

MIT © audiojs