format and error instead of warning for no convergence in loudness loop

            )

    if num_iter >= 10:

        warn(

        raise ValueError(

            f"Loudness did not converge to desired value, stopping at: {loudness_after:.2f}"

        )

        for im in range(len(in_meta)):

            out_meta.append(out_dir.joinpath(f"{Path(out_file).stem}.wav.{im}.csv"))

    tx_condition = False

    # execute each process sequentially, feed output into input of next process

    for p, (input, output), input_meta in zip(

        chain, pairwise(processing_paths), processing_paths_meta[:-1]

def remove_preamble(x, out_fmt, fs, repeat_signal, preamble, meta, logger):

    # remove preamble for ISM metadata

    if out_fmt.startswith("ISM"):

        # cut first half of the metadata