import { AudioListener } from './audioListener';
/**
 * Create a audio object.
 * This uses the Web Audio API.
 */
export declare class Audio {
    /** Whether to start playback automatically. Default is false. */
    autoplay: boolean;
    /** The AudioContext of the listener given in the constructor. */
    context: AudioContext;
    /** Modify pitch, measured in cents. +/- 100 is a semitone. +/- 1200 is an octave. Default is 0. */
    detune: number;
    /** Overrides the duration of the audio. Same as the duration parameter of AudioBufferSourceNode.start(). Default is undefined to play the whole buffer. */
    duration: number | undefined;
    /** Represents an array of BiquadFilterNodes. Can be used to apply a variety of low-order filters to create more complex sound effects. Filters are set via Audio.setFilter or Audio.setFilters. */
    filters: BiquadFilterNode[];
    /** A GainNode created using AudioContext.createGain(). */
    gain: GainNode;
    /** Whether playback can be controlled using the play(), pause() etc. methods. Default is true. */
    hasPlaybackControl: boolean;
    /** Whether the audio is currently playing. */
    isPlaying: boolean;
    /** A reference to the listener object of this audio. */
    listener: AudioListener;
    /** An offset to the time within the audio buffer that playback should begin. Same as the offset parameter of AudioBufferSourceNode.start(). Default is 0. */
    offset: number;
    /** Speed of playback. Default is 1. */
    playbackRate: number;
    /** An AudioBufferSourceNode created using AudioContext.createBufferSource(). */
    source: AudioBufferSourceNode | null;
    /** Type of the audio source. Default is string 'empty'. */
    sourceType: string;
    /** String denoting the type, set to 'Audio'. */
    type: string;
    private buffer;
    private loop;
    private loopEnd;
    private loopStart;
    private _connected;
    private _progress;
    private _startedAt;
    /**
     * @param listener [AudioListener](https://threejs.org/docs/#api/en/audio/AudioListener) instance.
     */
    constructor(listener: AudioListener);
    /** Return the gainNode. */
    getOutput(): GainNode;
    /**
     * Setup the source to the audioBuffer, and sets sourceType to 'audioNode'.
     * Also sets hasPlaybackControl to false.
     */
    setNodeSource(audioNode: AudioBufferSourceNode): this;
    /**
     * Applies the given object of type HTMLMediaElement as the source of this audio.
     * Also sets hasPlaybackControl to false.
     */
    setMediaElementSource(mediaElement: HTMLMediaElement): this;
    /**
     * Applies the given object of type MediaStream as the source of this audio.
     * Also sets hasPlaybackControl to false.
     */
    setMediaStreamSource(mediaStream: MediaStream): this;
    /**
     * Setup the source to the audioBuffer, and sets sourceType to 'buffer'.
     * If autoplay, also starts playback.
     */
    setBuffer(audioBuffer: AudioBuffer): this;
    /** If hasPlaybackControl is true, starts playback. */
    play(delay?: number): this | undefined;
    /** If hasPlaybackControl is true, pauses playback. */
    pause(): this | undefined;
    /** If hasPlaybackControl is enabled, stops playback. */
    stop(): this | undefined;
    /** Connect to the Audio.source. This is used internally on initialisation and when setting / removing filters. */
    connect(): this;
    /** Disconnect from the Audio.source. This is used internally when setting / removing filters. */
    disconnect(): this;
    /** Returns the filters array. */
    getFilters(): BiquadFilterNode[];
    /**
     * value - arrays of filters.
     * Applies an array of BiquadFilterNodes to the audio.
     */
    setFilters(value: BiquadFilterNode[]): this;
    /** Returns the first element of the filters array. */
    getFilter(): BiquadFilterNode;
    /** Applies a single BiquadFilterNode to the audio. */
    setFilter(filter: BiquadFilterNode): this;
    /** If hasPlaybackControl is enabled, set the playbackRate to value. */
    setPlaybackRate(value: number): this | undefined;
    /** Return the value of playbackRate. */
    getPlaybackRate(): number;
    /** Called automatically when playback finished. */
    onEnded(): void;
    /** Return the value of source.loop (whether playback should loop). */
    getLoop(): boolean;
    /** Set source.loop to value (whether playback should loop). */
    setLoop(value: boolean): this | undefined;
    /** Set source.loopStart to value. */
    setLoopStart(value: number): this;
    /** Set source.loopEnd to value. */
    setLoopEnd(value: number): this;
    /** Return the current volume. */
    getVolume(): number;
    /** Set the volume. */
    setVolume(value: number): this;
    private setDetune;
    private getDetune;
}
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