code: def test_gaussian_noise_snr_multichannel(self):
      np.random.seed(42)
      samples = np.random.normal(0, 0.1, size=(3, 8888)).astype(
          np.float32
      )
      augmenter = AddGaussianSNR(min_snr_db=15, max_snr_db=35, p=1.0)
      samples_out = augmenter(samples=samples, sample_rate=16000)
  
      assert samples_out.dtype == np.float32
      assert float(np.sum(np.abs(samples_out))) > float(
          np.sum(np.abs(samples))
      )
  
file_path: audiomentations/tests/test_gaussian_snr.py
imports: import json
  import pytest
  import numpy
  from audiomentations import AddGaussianSNR
label_desc: Use image node_id 4 for calling the TestGaussianSNR obj's underlying member method code with example usage: obj.test_gaussian_noise_snr_multichannel() without return types