class_docstr: Multiscale STFT loss for multi band model outputs 
class_docstr_tok: ["Multiscale","STFT","loss","for","multi","band","model","outputs"]
code: def forward(self, y_hat, y):
      y_hat = y_hat.view(-1, 1, y_hat.shape[2])
      y = y.view(-1, 1, y.shape[2])
      return super().forward(y_hat.squeeze(1), y.squeeze(1))
  
imports: import torch
  from torch import nn
  from torch.nn import functional
label_desc: Use image node_id 1 for calling the MultiScaleSubbandSTFTLoss obj's underlying member method code with example usage: obj.forward(y_hat, y) and returns: super