class_docstr: A base class for models that convert mel spectrograms to linear (magnitude) spectrograms
class_docstr_tok: ["A","base","class","for","models","that","convert","mel","spectrograms","to","linear","(","magnitude",")","spectrograms"]
docstr: Accepts a batch of spectrograms and returns a batch of linear spectrograms
  
  Args:
      mel: A torch tensor representing the mel spectrograms ['B', 'mel_freqs', 'T']
  
  Returns:
      spec: A torch tensor representing the linear spectrograms ['B', 'n_freqs', 'T']
docstr_tok: ["Accepts","a","batch","of","spectrograms","and","returns","a","batch","of","linear","spectrograms","Args",":","mel",":","A","torch","tensor","representing","the","mel","spectrograms","[","'","B","'",",","'mel_freqs","'",",","'T","'","]","Returns",":","spec",":","A","torch","tensor","representing","the","linear","spectrograms","[","'","B","'",",","'n_freqs","'",",","'T","'","]"]
code: def convert_mel_spectrogram_to_linear(
      self, mel: "torch.tensor", **kwargs
  ) -> "torch.tensor":
      """
      Accepts a batch of spectrograms and returns a batch of linear spectrograms
  
      Args:
          mel: A torch tensor representing the mel spectrograms ['B', 'mel_freqs', 'T']
  
      Returns:
          spec: A torch tensor representing the linear spectrograms ['B', 'n_freqs', 'T']
      """
  
imports: import json
  from abc import ABC, abstractmethod
  from contextlib import ExitStack, contextmanager
  from typing import List, Optional
  import torch
  from omegaconf import DictConfig
  from tqdm import tqdm
  from nemo.collections.tts.parts.utils.helpers import OperationMode
  from nemo.core.classes import ModelPT
  from nemo.core.classes.common import PretrainedModelInfo, typecheck
  from nemo.core.neural_types.elements import AudioSignal
  from nemo.core.neural_types.neural_type import NeuralType
  from nemo.utils import logging, model_utils
label_desc: Use image node_id 1 for calling the MelToSpec obj's underlying member method code with example usage: obj.convert_mel_spectrogram_to_linear(mel) without return types