export declare function process_wav_file(filename: string, format: "native" | "normalized", callback: (c: Array<number>, prev: null | Array<number>, n_sample: number, metadata: {
    num_channels: number;
    sample_rate: number;
    bytes_per_sample: number;
}) => void, opts?: {
    treat_maxsize_chunks_as_infinite?: boolean;
}): Promise<void>;