code: def upsample(signal, factor):
      signal = signal.permute(0, 2, 1)
      signal = nn.functional.interpolate(
          signal, size=signal.shape[-1] * factor
      )
      return signal.permute(0, 2, 1)
  
imports: import math
  import librosa
  import numpy
  import torch
  import torch.fft
  import torch.nn
  from scipy.signal import get_window
label_desc: Use image node_id 5 for calling a global function with example usage: upsample(signal, factor) and returns: signal