thinkdsp.py 文件源码

def make_wave(self):
        """Transforms to the time domain.

        returns: Wave
        """
        N = len(self.hs)
        ys = scipy.fftpack.idct(self.hs, type=2) / 2 / N
        #NOTE: whatever the start time was, we lose it when
        # we transform back
        #ts = self.start + np.arange(len(ys)) / self.framerate
        return Wave(ys, framerate=self.framerate)