import TimedEvent from './timedEvent';
/**
 * TimedAudio wraps an HTMLAudioElement and maps playback to the TimedEvent
 * lifecycle. It synchronizes elapsedTime with the element's playback position
 * and forwards start/pause/resume/cancel calls to the audio element.
 *
 * constructor(duration=0, url='', gain=1.0)
 *  - duration: number in ms (0 unknown, -1 loop)
 *  - url: source URL for the audio element
 *  - gain: initial volume (0.0 - 1.0)
 */
export default class TimedAudio extends TimedEvent {
    url: string;
    gain: number;
    muted: boolean;
    element: HTMLAudioElement | null;
    constructor(duration?: number, url?: string, gain?: number);
    initElListeners(): void;
    start(): void;
    pause(): void;
    resume(): void;
    cancel(): void;
    setVolume(gain?: number): void;
    protected tick(): void;
}
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