code: def load_wav(wav_file, sr):
      wav, _ = librosa.load(wav_file, sr=sr, mono=True)
      return wav
  
file_path: PaddleHub/modules/audio/svs/diffsinger/utils/cwt.py
imports: import librosa
  import numpy
  from pycwt import wavelet
  from scipy.interpolate import interp1d
label_desc: Use image node_id 1 for calling a global function with example usage: load_wav(wav_file, sr) and returns: wav