code: def sinc_unnormalized(x: float) -> float:
      """Unnormalized sinc.
  
      Args:
          x: input value
  
      Returns:
          Calculates sin(x)/x
      """
      return np.sinc(x / np.pi)
  
imports: import math
  from typing import Iterable, Optional, Union
  import librosa
  import numpy
  import numpy.typing
  import scipy
  import soundfile
  import torch
  from scipy.spatial.distance import pdist, squareform
  from nemo.utils import logging
label_desc: Use image node_id 3 for calling a global function with example usage: sinc_unnormalized(x) and returns: np