chromium/third_party/blink/web_tests/http/tests/priorities/resources/preload/as-audio.html

<script src="../common.js"></script>
<script>
  observeAndReportResourceLoadPriority(new URL('../../../resources/test.wav', location));
</script>

<link rel="preload" as="audio" href="../../../resources/test.wav" type="audio/wav" onload="reportLoaded()" onerror="reportFailure()"></script>