import TimedEvent from './timedEvent';
/**
 * TimedSpeech uses the Web Speech API (SpeechSynthesis) to speak text and
 * map speech progress to TimedEvent progress. Marks in the utterance are
 * used to approximate elapsed duration and progress notifications.
 *
 * constructor(text, gain, speed)
 *  - text: string to speak (basic splitting into marks is applied)
 *  - gain: volume (0.0 - 1.0)
 *  - speed: speaking rate
 */
export default class TimedSpeech extends TimedEvent {
    markCount: number;
    currentMark: number;
    gain: number;
    utterance: SpeechSynthesisUtterance;
    constructor(text?: string, gain?: number, speed?: number);
    start(): void;
    pause(): void;
    resume(): void;
    cancel(): void;
    setVolume(gain?: number): void;
    protected tick(): void;
}
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