code: def test_multichannel(self):
      samples = np.array(
          [
              [0.9, 0.5, -0.25, -0.125, 0.0],
              [0.95, 0.5, -0.25, -0.125, 0.0],
          ],
          dtype=np.float32,
      )
      sample_rate = 16000
      augmenter = Reverse(p=1.0)
      reversed_samples = augmenter(
          samples=samples, sample_rate=sample_rate
      )
  
      assert samples.dtype == np.float32
      assert_array_almost_equal(
          reversed_samples,
          np.array(
              [
                  [0.0, -0.125, -0.25, 0.5, 0.9],
                  [0.0, -0.125, -0.25, 0.5, 0.95],
              ],
              dtype=np.float32,
          ),
      )
  
imports: import numpy
  from numpy.testing import assert_array_almost_equal
  from audiomentations import Reverse
label_desc: Use image node_id 2 for calling the TestReverse obj's underlying member method code with example usage: obj.test_multichannel() without return types