fix the output filename in audio.fromfile()

        run(cmd, cwd=binary.resolve().parent)

        fmt = f"MASA{num_tcs}DIR{num_dirs}"

        masa = audio.fromfile(fmt, tmp_out_pcm, 48000, tmp_out_met)

        masa = audio.fromfile(fmt, tmp_out_pcm, 48000, metadata_out_filename)

        return masa