import type { VocalAnalysis } from "../types/audio.js";
/**
 * Map band RMS relative to a broader reference band into 0–1.
 * `soft` = quiet band (score 0), `hard` = dominant band (score 1).
 * Relative dB = bandDb - refDb (typically negative).
 */
export declare function relativeBandScore(bandDb: number | null, refDb: number | null, soft: number, hard: number): number | null;
export declare function analyzeVocalStem(inputPath: string): Promise<VocalAnalysis>;