@audio/loudness

Try it in the browser: Loudness meter and normalizer. Runs on this package, nothing is uploaded.

Loudness metering per ITU-R BS.1770-4 / EBU R128 — umbrella re-exporting every @audio/loudness-* atom.

import { lufs, truepeak, lra, replaygain, dr, speechContrast, sounds } from '@audio/loudness'

lufs(channels, { fs: 48000 })        // integrated LUFS
replaygain(channels, { fs: 48000 })  // { gain, lufs, peak }

Each atom ships standalone:

| Atom | Measures | |---|---| | @audio/loudness-lufs | Integrated loudness (LUFS) — BS.1770-4 K-weighted gated, EBU Tech 3341-verified | | @audio/loudness-truepeak | True peak (dBTP) — 4× sinc-oversampled inter-sample peak, BS.1770-4 Annex 2 | | @audio/loudness-lra | Loudness range (LRA) — EBU Tech 3342 short-term distribution, P95−P10 after gating | | @audio/loudness-replaygain | ReplayGain 2.0 — track gain to the −18 LUFS reference + sample peak | | @audio/loudness-dr | DR value — TT/dr14 crest-factor dynamic range | | @audio/loudness-contrast | Speech contrast — foreground/background RMS difference, WCAG 2.0 SC 1.4.7 | | @audio/loudness-sounds | Sound labeling — level-threshold region detection (Audacity Label Sounds) |

Multichannel weights default to BS.1770-4 Table 1 by channel count (SMPTE/WAV/Web Audio order, LFE excluded). K-weighting lives in @audio/weighting-k — exact BS.1770-4 at any sample rate.

Bare npm loudness is an unrelated package — hence the scope.