code: def volume_norm(
      *, x: np.ndarray = None, coef: float = 0.95, **kwargs
  ) -> np.ndarray:
      """Normalize the volume of an audio signal.
  
      Args:
          x (np.ndarray): Raw waveform.
          coef (float): Coefficient to rescale the maximum value. Defaults to 0.95.
  
      Returns:
          np.ndarray: Volume normalized waveform.
      """
      return x / abs(x).max() * coef
  
imports: from io import BytesIO
  from typing import Tuple
  import librosa
  import numpy
  import scipy
  import soundfile
  from librosa import magphase, pyin
label_desc: Use image node_id 23 for calling a global function with example usage: volume_norm() and returns: unknown