code: def send_audio(self, left_channel, right_channel):
          
          if self.audio_pipe is None:
              if not os.path.exists('/tmp/audiopipe'):
                  os.mkfifo('/tmp/audiopipe')
              self.audio_pipe = os.open('/tmp/audiopipe', os.O_WRONLY)
  
          assert len(left_channel.shape) == 1
          assert left_channel.shape == right_channel.shape
  
          frame = np.column_stack((left_channel, right_channel)).flatten()
  
          frame = np.clip(32767*frame, -32767, 32767).astype('int16')
          try:
              os.write(self.audio_pipe, frame.tostring())
          except OSError:
              # The pipe has been closed. Reraise and handle it further
              # downstream
              raise
docs: Add the audio samples to the stream. The left and the right
          channel should have the same shape.
          Raises an OSError when the stream is closed.
  
          :param left_channel: array containing the audio signal.
          :type left_channel: numpy array with shape (k, )
              containing values between -1.0 and 1.0. k can be any integer
          :param right_channel: array containing the audio signal.
          :type right_channel: numpy array with shape (k, )
              containing values between -1.0 and 1.0. k can be any integer