code: def s_multi():
      y, sr = librosa.load(
          os.path.join("tests", "data", "test1_44100.wav"),
          sr=None,
          mono=False,
      )
      return np.abs(librosa.stft(y))
  
imports: import os
  import numpy
  import scipy.sparse
  import librosa
  import sklearn.decomposition
  import pytest
  from test_core import srand
label_desc: Use image node_id 17 for calling a global function with example usage: s_multi() and returns: np