<html>
<head>
  <title>Test large bufferOffset in copyToChannel()</title>
</head>
<script>
  const a = new AudioBuffer({length: 0x10, sampleRate: 44100});
  const b = new Float32Array(0x51986);
  a.copyToChannel(b, 0, 0x40004000)
</script>
</html>
