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chromium/third_party/blink/web_tests/webaudio/WaveShaper/waveshaper-oversample-4x.html 

<!DOCTYPE html>
<html>
  <head>
    <title>
      waveshaper-oversample-4x.html
    </title>
    <script src="../../resources/testharness.js"></script>
    <script src="../../resources/testharnessreport.js"></script>
    <script src="../resources/audit-util.js"></script>
    <script src="../resources/audit.js"></script>
    <script src="../resources/mix-testing.js"></script>
    <script src="../resources/waveshaper-testing.js"></script>
  </head>
  <body>
    <script id="layout-test-code">
      let testParams = {
        'sampleRate': 44100,
        'oversample': '4x',

        // Should generate harmonics at 18000, 36000, 54000, 72000
        // All except for 18000 should be filtered out with the 4x oversampling.
        'fundamentalFrequency': 18000,
        'acceptableAliasingThresholdDecibels': -79.88,
        description: '4x WaveShaperNode oversampling'
      };
      runWaveShaperOversamplingTest(testParams);
    </script>
  </body>
</html>