code: def fft_frequencies(sr=22050, n_fft=2048):
      """Alternative implementation of `np.fft.fftfreq`
      Parameters
      ----------
      sr : number > 0 [scalar]
          Audio sampling rate
      n_fft : int > 0 [scalar]
          FFT window size
      Returns
      -------
      freqs : np.ndarray [shape=(1 + n_fft/2,)]
          Frequencies `(0, sr/n_fft, 2*sr/n_fft, ..., sr/2)`
      Examples
      --------
      >>> librosa.fft_frequencies(sr=22050, n_fft=16)
      array([     0.   ,   1378.125,   2756.25 ,   4134.375,
               5512.5  ,   6890.625,   8268.75 ,   9646.875,  11025.   ])
      """
  
      return np.linspace(
          0, float(sr) / 2, int(1 + n_fft // 2), endpoint=True
      )
  
file_path: nnAudio/Installation/nnAudio/librosa_functions.py
imports: import numpy
  import warnings
label_desc: Use image node_id 5 for calling a global function with example usage: fft_frequencies(sr, n_fft) and returns: np