/// <reference types="node" />
import { Readable } from "stream";
import IOIHistogram from "./IOIHistogram";
import BeatAgent from "./BeatAgent";
import { Smp, Hz, Seconds } from "../global";
declare interface BeatTrackingConfig {
    /** Size of fft frame to use. */
    windowSize?: Smp;
    /** Interval between FFT frames. */
    hopSize?: Smp;
    /** @deprecated */
    sampleRate?: Hz;
    peakFindingDecayRate?: number;
    /** (measured in hops) */
    peakFindingWindow?: number;
    peakFindingMeanWndMultiplier?: number;
    /** Threshold over which (normalised) spectral flux could be regarded as a peak. */
    peakThreshold?: 0.35;
}
declare interface BeatTrackingAnalysis {
    /** Best estimate of beats per minute. */
    bpm: number;
    /** List of estimated beat times. */
    beats: Seconds[];
    /** List of peak times. */
    onsets: {
        time: Seconds;
        intensity: number;
    }[];
    /** Agents used  */
    agents: BeatAgent[];
    /** @deprecated */
    spectralFlux?: number[] | null;
    /** @deprecated */
    ioiHistogram?: IOIHistogram;
    /** @deprecated */
    hopSize?: number;
    /** Parameters used to make the analysis. */
    config: BeatTrackingConfig;
}
/** Perform beat tracking on a given AudioBuffer or AudioBuffer object-stream. */
declare function doBeatTracking(audio: Readable | AudioBuffer, { windowSize, hopSize, sampleRate, peakFindingDecayRate, peakFindingWindow, peakFindingMeanWndMultiplier, peakThreshold, }?: BeatTrackingConfig, 
/** Deprecated. */
returnExtras?: boolean): Promise<BeatTrackingAnalysis>;
export { doBeatTracking, BeatTrackingAnalysis, BeatTrackingConfig };