cond value is the stepping over possible scales (i.e., clean-
        data quantiles) (default=[0.01, 0.01]).
    beta : array
        Range that the clean EEG distribution&#39;s shape parameter beta may take.

    Returns
    -------
    mu : array
        Estimated mean of the clean EEG distribution.
    sig : array
        Estimated standard deviation of the clean EEG distribution.
    alpha : float
        Estimated scale parameter of the generalized Gaussian clean EEG
        distribution.
    beta : f