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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def transform_audio(self, y):
        '''Compute the CQT with unwrapped phase

        Parameters
        ----------
        y : np.ndarray
            The audio buffer

        Returns
        -------
        data : dict
            data['mag'] : np.ndarray, shape=(n_frames, n_bins)
                CQT magnitude

            data['dphase'] : np.ndarray, shape=(n_frames, n_bins)
                Unwrapped phase differential
        '''
        data = super(CQTPhaseDiff, self).transform_audio(y)
        data['dphase'] = self.phase_diff(data.pop('phase'))
        return data