export declare class MaterialSoundConfig {
    sound: string;
    volume?: number;
    loop?: boolean;
    startsAt?: number;
    endsAt?: number;
    duration?: number;
    speed?: number;
    delay?: number;
    /**
     * Play when the animation ends instead of when it starts, `delay` counting from there.
     *
     * This exists because the sound of an item is not always the sound of it leaving. A piece that travels is
     * heard when it touches down, and only the player knows how long it travels — the material description
     * declares its sounds long before any of them is animated. So the intent is stated here and the delay is
     * computed against the animation.
     */
    atEnd?: boolean;
    constructor(sound: string);
}