def octs_to_hz(octs, A440=<NUM_LIT>):
return (float(A440) / <NUM_LIT:16>)*(<NUM_LIT>**np.asanyarray(octs))<EOL>
Convert octaves numbers to frequencies.

    Octaves are counted relative to A.

    Examples
    --------
    >>> librosa.octs_to_hz(1)
    55.
    >>> librosa.octs_to_hz([-2, -1, 0, 1, 2])
    array([   6.875,   13.75 ,   27.5  ,   55.   ,  110.   ])

    Parameters
    ----------
    octaves       : np.ndarray [shape=(n,)] or float
        octave number for each frequency
    A440          : float
        frequency of A440

    Returns
    -------
    frequencies   : number or np.ndarray [shape=(n,)]
        scalar or vector of frequencies

    See Also
    --------
    hz_to_octs