code: def __call__(self, x):
      return logmelspectrogram(
          x,
          fs=self.fs,
          n_mels=self.n_mels,
          n_fft=self.n_fft,
          n_shift=self.n_shift,
          win_length=self.win_length,
          window=self.window,
      )
  
imports: import librosa
  import numpy
label_desc: Use image node_id 3 for calling the LogMelSpectrogram obj's underlying member method code with example usage: obj.__call__(x) and returns: logmelspectrogram