  last axis is stacked real and imaginary
        n_fft (int, optional): transform FFT size. Defaults to 4096.
        n_hop (int, optional): transform hop size. Defaults to 1024.
        window (callable, optional): window function
        center (bool, optional): If True, the signals first window is
            zero padded. Centering is required for a perfect
            reconstruction of the signal. However, during training
            of spectrogram models, it can safely turned off.
            Defaults