docstr: Converts spectrogram to waveform using librosa
docstr_tok: ["Converts","spectrogram","to","waveform","using","librosa"]
code: def inv_spectrogram(self, spectrogram):
      """Converts spectrogram to waveform using librosa"""
      S = self.denormalize(spectrogram)
      S = self._db_to_amp(S)
      # Reconstruct phase
      if self.preemphasis != 0:
          return self.apply_inv_preemphasis(
              self._griffin_lim(S**self.power)
          )
      return self._griffin_lim(S**self.power)
  
imports: import librosa
  import soundfile
  import numpy
  import scipy.io.wavfile
  import scipy.signal
  from TTS.tts.utils.data import StandardScaler
label_desc: Use image node_id 16 for calling the AudioProcessor obj's underlying member method code with example usage: obj.inv_spectrogram(spectrogram) and returns: self, self