sound.py 文件源码

def _init_stretching(self):
        # Resp. index of current audio chunk and computed phase
        self._i1, self._i2 = 0, 0
        self._N, self._H = self.chunk_size, int(self.chunk_size / 4)

        self._win = numpy.hanning(self._N)
        self._phi = numpy.zeros(self._N, dtype=self.y.dtype)
        self._sy = numpy.zeros(len(self.y), dtype=self.y.dtype)

        if not hasattr(self, '_sf'):
            self.stretch_factor = 1.0

        self._zero_padding()