code: def test_number_of_channels_is_changed(
      self, feature_shape, example_num_channels, example_output_shape
  ):
      feature = features.Audio(
          file_format="wav", dtype=np.int16, shape=feature_shape
      )
      _, tmp_file = tempfile.mkstemp()
      np_audio = _create_np_audio(example_num_channels, np.int16)
      _write_audio_file(np_audio, tmp_file, "wav")
      self.assertEqual(
          feature.encode_example(tmp_file).shape, example_output_shape
      )
  
imports: import array
  import pathlib
  import tempfile
  from absl.testing import parameterized
  import numpy
  import pydub
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
label_desc: Use image node_id 8 for calling the AudioFeatureTest obj's underlying member method code with example usage: obj.test_number_of_channels_is_changed(feature_shape, example_num_channels, example_output_shape) without return types