code: def get_LR(self,in_data):
          
          for i in range(0,self.frame_length*2):
              if i % 2:
                  self.right_in[(int)(i/2)] = in_data[i]
              else:
                  self.left_in[(int)(i/2)] = in_data[i]
          return self.left_in, self.right_in
docs: Splits incoming packed stereo data into separate left and right channels
          and returns an array of left samples and an array of right samples
          
          Parameters
          ----------
          in_data : input data from the streaming object in the callback function. 
          
          Returns
          -------
          left_in : array of incoming left channel samples
          right_in : array of incoming right channel samples