@audio/mir-coversong

Cover song identification — frame-chroma sequences compared after Optimal Transposition Index alignment (Ellis 2007 lineage); recognizes a composition through key changes, re-orchestration and level differences.

npm install @audio/mir-coversong

import coversong from '@audio/mir-coversong'

let r = coversong(takeA, takeB, { fs: 44100 })
// { score: 0..1 (mean cosine at best alignment), transposition: semitones b→a, lag: frames }

Options: - fs — sample rate (default 44100, Hz) · maxLag — search window as a fraction of the shorter sequence (default 0.5)

Also exported as an audio.js stat manifest (./audio — pass the comparison take as { ref }).

Part of @audio/mir.