/**
 * Play a short sound effect.
 * @param src - The source of the audio file.
 * @param volume - The volume of the audio (default is 1).
 */
export declare function playSfx(src: string, volume?: number, speed?: number): HTMLAudioElement | undefined | null;
export declare const beep: () => void;
/**
 * Play or loop background music.
 * @param src - The source of the audio file.
 * @param volume - The volume of the audio (default is 1).
 * @param loop - Whether the audio should loop (default is true).
 */
export declare function playBackgroundMusic(src: string, volume: number | undefined, loop: boolean | undefined, eventName: string): void;
export declare function toggleBackgroundMusic(): void;
/**
 * Stop the background music.
 */
export declare function stopBackgroundMusic(): void;
/**
 * Set the playback position of the background music.
 * @param time - The time (in seconds) to set the playback position to.
 */
export declare function setBackgroundMusicPosition(time: number): void;
export declare function fadeOut(): void;