code: def testPinkNoise(self):
      input = [1.0 / x for x in range(1, 44101)]
      result = RollOff(cutoff=0.85)(input)
      self.assertAlmostEqual(result, 1.50003397465)
  
file_path: essentia/test/src/unittests/spectral/test_rolloff.py
imports: from essentia_test import *
label_desc: Use image node_id 5 for calling the TestRollOff obj's underlying member method code with example usage: obj.testPinkNoise() without return types