code: def setUp(self):
      super().setUp()
      self._encode = encoder._TensorFlowWavEncoder()
      space = np.linspace(0.0, 100.0, 44100)
      self._stereo = np.array(
          [np.sin(space), np.cos(space)]
      ).transpose()
      self._mono = self._stereo.mean(axis=1, keepdims=True)
  
file_path: tensorboard/tensorboard/util/encoder_test.py
imports: import numpy
  import tensorflow
  from tensorboard.util import encoder
label_desc: Use image node_id 1 for calling the TensorFlowWavEncoderTest obj's underlying member method code with example usage: obj.setUp() without return types