correction of categories per talker/talker pairs in ISM1 and ISM2 tests

        else:

            y_meta = np.concatenate([y_meta, x_meta])

    # write individual ISM audio streams to the output file in an interleaved format

    audiofile.write(

        os.path.join(

            cfg.output_path,

            "cat"+scene["name"][1],

            cfg.use_output_prefix + os.path.basename(scene["name"] + ".wav"),

        ),

        y.audio,

        y.fs,

    )

    # write individual ISM metadata to output files in .csv format

    for i in range(N_sources):

        # generate .csv filename (should end with .0.csv, .1.csv, ...)