def fourier(framearray):
    """ Fourier transforms all waves from array.
    (Real values only)

    :param framearray: array of waves (frames)
    :return: array of FFT waves (spectrums)
    """

    fourier_frame = []

    for frame in framearray:
        index = frame.make_spectrum()
        fourier_frame.append(index)

    return fourier_frame