code: def normalize_tacotron_mel(mel):
      return (
          2
          * (
              (mel - TACOTRON_MEL_MIN)
              / (TACOTRON_MEL_MAX - TACOTRON_MEL_MIN)
          )
          - 1
      )
  
imports: import os
  from glob import glob
  from typing import Dict, List
  import librosa
  import numpy
  import torch
  import torchaudio
  from scipy.io.wavfile import read
  from TTS.utils.audio.torch_transforms import TorchSTFT
label_desc: Use image node_id 7 for calling a global function with example usage: normalize_tacotron_mel(mel) and returns: unknown