fix comparison per file type and reporting

        subprocess.run([isar_post_renderer_path] + isar_post_rend_opts.split()[1:], check = True)

    diff_opts = replace_paths(diff_opts, testv_path, ref_path, cut_path)

    result = True

    suffix = ""

    diff_in = {".wav": False, ".met": False, ".csv": False}

    for cmd in diff_opts.split(';'):

        file_a = Path(cmd.split()[1])

        file_b = Path(cmd.split()[2])

        suffix = file_a.suffix

        assert suffix == file_b.suffix

        assert suffix in diff_in

        # for .csv ISM metadata files, do text-based comparison to not take line endings into account

        # everything else (.wav output files and MASA metadata files) is compared as binary files

        if Path(file_a).suffix == ".csv":

            with open(file_a, "r") as f_a:

                with open(file_b, "r") as f_b:

                    a_content = f_a.read()

                    b_content = f_b.read()

                    result = result and a_content == b_content

                    files_equal = a_content == b_content

        else:

            result = result and filecmp.cmp(file_a, file_b)

            files_equal = filecmp.cmp(file_a, file_b)

    if not result:

        if not files_equal:

            diff_in[suffix] = True

    if any(diff_in.values()):

        result_str = "Output differs in: "

        if suffix == ".csv":

        if diff_in[".csv"]:

            result_str += "object metadata "

        elif suffix == ".met":

        if diff_in[".met"]:

            result_str += "MASA metadata "

        elif suffix == ".wav":

        if diff_in[".wav"]:

            result_str += "waveform"

        else:

            assert False, f"Either no diff commands were found or the output files had an incorrect suffix. \ncmd: {diff_opts}"

        pytest.fail(result_str)