import { File, PhotoSize } from './index';
export declare type AudioUnion = Audio;
/** Describes an audio file. Audio is usually in MP3 format */
export interface Audio {
    _: 'audio';
    /** Duration of the audio, in seconds; as defined by the sender */
    duration: number;
    /** Title of the audio; as defined by the sender */
    title: string;
    /** Performer of the audio; as defined by the sender */
    performer: string;
    /** Original name of the file; as defined by the sender */
    fileName: string;
    /** The MIME type of the file; as defined by the sender */
    mimeType: string;
    /**
     * The thumbnail of the album cover; as defined by the sender. The full size thumbnail
     * should be extracted from the downloaded file; may be null
     */
    albumCoverThumbnail?: PhotoSize;
    /** File containing the audio */
    audio: File;
}