code: def test_padding_multichannel(self, mode, pad_section):
      samples = np.array(
          [
              [0.9, 0.5, -0.25, -0.125, 0.0],
              [0.95, 0.5, -0.25, -0.125, 0.0],
              [0.95, 0.5, -0.25, -0.125, 0.0],
          ],
          dtype=np.float32,
      )
      sample_rate = 16000
      input_shape = samples.shape
  
      augmenter = Padding(mode=mode, pad_section=pad_section, p=1.0)
      samples = augmenter(samples=samples, sample_rate=sample_rate)
  
      assert samples.dtype == np.float32
      assert samples.shape == input_shape
  
file_path: audiomentations/tests/test_padding.py
imports: import random
  import numpy
  import pytest
  from numpy import array_equal
  from audiomentations import Padding
label_desc: Use image node_id 3 for calling the TestPadding obj's underlying member method code with example usage: obj.test_padding_multichannel(mode, pad_section) without return types