export interface FlipSoundOptions {
    /** A clip URL that overrides the bundled default (fetched at runtime). */
    url?: string;
    /** Playback volume, 0..1. Default 0.5. */
    volume?: number;
}
/**
 * Plays a short sound on each page turn.
 *
 * Everything here is best-effort: a browser that gates audio behind a gesture, has no Web Audio, or
 * cannot decode the clip simply stays silent. A page flip must never throw or stall because of
 * sound, so every path is guarded and failures are swallowed.
 *
 * Web Audio (not `<audio>`) so rapid flips overlap cleanly — each turn plays a fresh buffer source
 * through one shared gain node (volume + mute).
 */
export declare class FlipSound {
    #private;
    constructor(options?: FlipSoundOptions);
    /** Whether this environment can play at all — no context constructor means never. */
    get available(): boolean;
    /**
     * Play the clip once. Best-effort: silent if audio is unavailable, muted, still gesture-locked,
     * or the clip has not decoded yet (the first flip may miss while it decodes; the rest play).
     */
    play(): void;
    setMuted(muted: boolean): void;
    isMuted(): boolean;
    destroy(): void;
}