class_docstr: Create audio batch.
code: def __init__(
      self, channels_first, channels, sample_rate=44100, batch_size=2
  ):
      self.channels_first = channels_first
      self.channels = channels
      self.sample_rate = sample_rate
      self.batch_size = batch_size
  
file_path: adversarial-robustness-toolbox/tests/defences/preprocessor/test_mp3_compression.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from art.defences.preprocessor import Mp3Compression
  from tests.utils import ARTTestException
label_desc: Use image node_id 1 to create a new AudioInput object  with example: obj = AudioInput(channels_first, channels, sample_rate, batch_size)