class_docstr: save/load round trip should not degrade data for lossless formats
docstr: save/load round trip should not degrade data for flac formats
code: def test_flac(self, sample_rate, num_channels, compression_level):
      """save/load round trip should not degrade data for flac formats"""
      original = get_wav_data("float32", num_channels)
      data = original
      for i in range(10):
          path = self.get_temp_path(f"{i}.flac")
          sox_io_backend.save(
              path, data, sample_rate, compression=compression_level
          )
          data, sr = sox_io_backend.load(path)
          assert sr == sample_rate
          self.assertEqual(original, data)
  
file_path: audio/test/torchaudio_unittest/backend/sox_io/roundtrip_test.py
imports: import itertools
  from parameterized import parameterized
  from torchaudio.backend import sox_io_backend
  from torchaudio_unittest.common_utils import get_wav_data, PytorchTestCase, skipIfNoExec, skipIfNoSox, TempDirMixin
  from .common import get_enc_params, name_func
label_desc: Use image node_id 2 for calling the TestRoundTripIO obj's underlying member method code with example usage: obj.test_flac(sample_rate, num_channels, compression_level) without return types