@audio/saturate-multiband

import multiband from '@audio/saturate-multiband'

Linkwitz-Riley crossover splits the signal into bands, each band gets its own @audio/saturate-tube drive (or none), and the bands sum back flat (FabFilter Saturn class — drive the low end without smearing the highs, or vice versa). bands is either one options object applied to every band, or an array with one entry per band — null/undefined in the array means that band passes through the crossover split unsaturated but still summed back in.

multiband(data, { freqs: [200, 2000], fs: 44100 })                          // 3 bands, no drive (crossover only)
multiband(data, { freqs: [1000], bands: [null, { drive: 5 }], fs: 44100 })  // drive only the high band
multiband(data, { freqs: [200, 2000], bands: { drive: 3 }, fs: 44100 })     // same drive on every band

Each band's @audio/saturate-tube options accept its own drive/bias/oversample — pass them inside the per-band object, e.g. { drive: 5, bias: 0.3 }.

Mutates data in place and returns it (same array reference, not a copy). No top-level mix: banded drive is applied per band via bands, and an unlisted/null band is the "0% wet" case for that band specifically.

Use when: driving one frequency region without smearing the others — bass warmth without top-end grit, or the reverse.
Not for: a single full-band character (use tube/transistor/tape/waveshaper directly — cheaper, no crossover phase interaction).

Part of the @audio/saturate family.

MIT © audiojs