Interface AudioPlayer

interface AudioPlayer {
    audioURL: string | undefined;
    howler: Howl | null;
    load: (src: string) => void;
    pauseWithFade: (fadeDuration?: number) => void;
    playWithFade: (fadeDuration?: number) => void;
    playWithPositionAndFade: (
        startPosition: number | null,
        audioPlayTime: number,
        startOffset?: number,
        fadeDuration?: number,
    ) => void;
    state: "playing" | "loading" | "not_playing";
}