@audio/tune-midi

Note-target pitch correction — align melody to reference MIDI/notes (Melodyne class)

MIDI-guided pitch correction — retune audio to a note guide (parsed SMF via @audio/midi-parse, or a plain note list): YIN F0 track → per-guide-note median → PSOLA shift to the guide pitch, crossfaded over dry. The melody-following complement of tune-snap's scale snapping.

import tuneMidi from '@audio/tune-midi'
import parse from '@audio/midi-parse'

let corrected = tuneMidi(data, { guide: parse(smfBytes) })     // or { guide: [{time, duration, midi}] }

tuneMidi(data: Float32Array, opts: {guide: Array<{time, duration, midi}> | {notes} (midi-parse output), fs=44100, a4=440, strength=1, tolerance=8 (¢), maxShift=700 (¢, skip wild targets), frameSize=2048, hop=512, fade=0.01}) → Float32Array

Built on @audio/pitch-yin (F0 tracking) and @audio/shift-psola (pitch shifting).

Install

npm i @audio/tune-midi