/**
 * Find the true downbeat phase by analyzing onset patterns
 * Much simpler and more reliable than complex spectral analysis
 */
export function findDownbeatPhase(audioData: any, beats: any, tempo: any, sampleRate: any): {
    phase: number;
    downbeats: any[];
    phaseScores: number[];
};
/**
 * Find the first strong downbeat in the track
 * This helps align loops to the actual musical phrasing
 */
export function findFirstDownbeat(audioData: any, tempo: any, sampleRate: any): number;
/**
 * Simple loop finder that respects musical boundaries
 *
 * @throws {Error} when the analyzed region carries no signal evidence
 *   (RMS at or below 1e3 × float32-tiny, i.e. silence or pure denormals).
 *   Without this gate, scoreLoopConsistency() degenerates on silence —
 *   all-zero chunk energies give zero variance and a PERFECT 1.0 score —
 *   fabricating maximum confidence out of nothing.
 */
export function findMusicalLoop(audioData: any, sampleRate: any, tempo: any, { preferredBars, minBars, maxBars }?: {
    preferredBars?: number;
    minBars?: number;
    maxBars?: number;
}): {
    start: number;
    end: number;
    bars: number;
    score: number;
};