code: def get_random_audio(duration=_AUDIO_DURATION, sample=_SAMPLE_RATE):
      """Returns random audio as np.ndarray (float32)."""
      sample_number = np.arange(duration * sample)
      waveform = np.sin(
          2 * np.pi * sample_number * 440.0 / sample
      ).astype(np.float32)
      waveform = waveform * 0.3
      return waveform
  
file_path: datasets/tensorflow_datasets/testing/fake_data_utils.py
imports: import random
  import tempfile
  import numpy
  from tensorflow_datasets.core import utils
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
label_desc: Use image node_id 4 for calling a global function with example usage: get_random_audio(duration, sample) and returns: waveform