move check for equality to the very top

            )

        search_path = toolsdir.joinpath(curr_platform.replace("Windows", "Win32"))

        wdiff = search_path.joinpath("wav-diff").with_suffix(".exe" if curr_platform == "Windows" else "")

        wdiff = search_path.joinpath("wav-diff").with_suffix(

            ".exe" if curr_platform == "Windows" else ""

        )

        if not wdiff.exists():

            wdiff = shutil.which("wav-diff")

        result["MLD"] = mld_max

    # Run remanining tests after checking if the lenght differs

    lengths_differ = ref.shape[0] != test.shape[0]

    """

    Calculate Segmental SNR for test_sig to ref_sig as defined in ISO/IEC 14496-4

    """

    # check if diff of signal is zero already, then SNR is infinite, since no noise

    signals_equal = (ref_sig == test_sig).all()

    if signals_equal:

        return np.asarray([np.inf] * ref_sig.shape[1])

    ss = list()

    # allocation here

    ref_sig_norm = ref_sig / -np.iinfo(np.int16).min

    # allocation here

    test_sig_norm = test_sig / -np.iinfo(np.int16).min

    # check if diff of signal is zero already, then SNR is infinite, since no noise

    # allocation here

    diff_sig_norm = ref_sig_norm - test_sig_norm

    if np.all(diff_sig_norm == 0):

        return np.asarray([np.inf] * ref_sig_norm.shape[1])

    # allocation here

    channels_identical_idx = np.sum(np.abs(diff_sig_norm), axis=0) == 0

    denom_add = 10**-13 * len_seg