import type { Sound } from "./core.ts";
/**
 * Fetches the bytes for an audio URL.
 *
 * Defaults to the engine's shared transport, which falls back to XHR for `file:`
 * URLs — `fetch()` cannot read that scheme in a Cordova or Capacitor WebView.
 * {@link setAudioFetcher} overrides it, for a custom transport or a test.
 *
 * The default is a working implementation rather than a stub that must be
 * installed, because a rejection here is not reported as an error: it tells the
 * backend to abandon Web Audio for that clip and fall back to a streaming HTML5
 * element. An un-installed stub would therefore degrade every network clip
 * silently instead of failing loudly.
 */
export type AudioFetcher = (url: string, options: {
    withCredentials?: boolean | undefined;
}) => Promise<ArrayBuffer>;
/**
 * Install the function the backend uses to fetch audio bytes.
 * @param fetcher - obtains the bytes for a URL, rejecting on failure
 */
export declare const setAudioFetcher: (fetcher: AudioFetcher) => void;
export declare const loadBuffer: (self: Sound) => void;
export declare const decodeAudioData: (arraybuffer: ArrayBuffer, self: Sound) => void;
export declare const loadSound: (self: Sound, buffer?: AudioBuffer) => void;
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