class_docstr: ReadWav OP test.
code: def test_read_wav(self):
      wav_path = str(Path(PACKAGE_OPS_DIR).joinpath("data/sm1_cln.wav"))
  
      with self.cached_session(use_gpu=False, force_gpu=False):
          config = {"speed": 1.0}
          read_wav = ReadWav.params(config).instantiate()
          audio_data, sample_rate = read_wav(wav_path)
          audio_data_true, sample_rate_true = librosa.load(
              wav_path, sr=16000
          )
          if config["speed"] == 1.0:
              self.assertAllClose(
                  audio_data.eval() / 32768, audio_data_true
              )
              self.assertAllClose(sample_rate.eval(), sample_rate_true)
  
file_path: delta/delta/data/frontend/read_wav_test.py
imports: import delta.compat
  from pathlib import Path
  import librosa
  from delta.data.frontend.read_wav import ReadWav
  from core.ops import PACKAGE_OPS_DIR
label_desc: Use image node_id 1 for calling the ReadWavTest obj's underlying member method code with example usage: obj.test_read_wav() without return types