code: def rms(x: np.ndarray) -> float:
      """Calculate RMS value for the input signal.
  
      Args:
          x: input signal
  
      Returns:
          RMS of the input signal.
      """
      return np.sqrt(np.mean(np.abs(x) ** 2))
  
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 8 for calling a global function with example usage: rms(x) and returns: np