code: def audio_batch(request):
      """
      Create audio fixtures of shape (batch_size=2, channels={1,2}, samples).
      """
      sample_rate_orig = 16000
      sample_rate_new = 8000
      test_input = np.zeros(
          (2, request.param, sample_rate_orig), dtype=np.int16
      )
      test_output = np.zeros(
          (2, request.param, sample_rate_new), dtype=np.int16
      )
      return test_input, test_output, sample_rate_orig, sample_rate_new
  
file_path: adversarial-robustness-toolbox/tests/defences/preprocessor/test_resample.py
imports: import logging
  import numpy
  import pytest
  import resampy
  from art.defences.preprocessor import Resample
  from tests.utils import ARTTestException
label_desc: Use image node_id 1 for calling a global function with example usage: audio_batch(request) and returns: test_input,  test_output,  sample_rate_orig,  sample_rate_new