def setUp(self):
        signal, samplingrate, _ = waveread("test/cmu_arctic/arctic_a0001.wav")
        self.world = World(samplingrate)
        self.alpha = estimate_alpha(samplingrate)
        self.samplingrate = samplingrate
        self.signal = signal
        self.f0, self.spec_mat, _ = self.world.analyze(signal)
        self.ep = ExcitePulse(16000, 80, False)
        self.order = 24