/// <reference types="node" />
import { trackType, albumType } from './index';
/**
 * Add metdata to the mp3
 * @param {Buffer} trackBuffer decrypted track buffer
 * @param {Object} track json containing track infos
 * @param {Number} albumCoverSize album cover size in pixel
 */
export declare const addTrackTags: (trackBuffer: Buffer, og_track: trackType, albumCoverSize?: number) => Promise<Buffer>;
declare type coverSize = 50 | 230 | 600 | number;
export declare const downloadAlbumCover: (album: albumType, albumCoverSize: coverSize) => Promise<Buffer | null>;
export declare const writeMetadataFlac: (buffer: Buffer, track: trackType, dimension: number, cover?: Buffer | null | undefined) => Buffer;
export {};