<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>

function boom()
{
  var ac = new window.AudioContext();

  var _ChannelMergerNode = ac.createChannelMerger(4);

  var _MediaStreamAudioDestinationNode = ac.createMediaStreamDestination();
  var _MediaStream = _MediaStreamAudioDestinationNode.stream;
  var _MediaStreamAudioSourceNode = ac.createMediaStreamSource(_MediaStream);

  _ChannelMergerNode.connect(_MediaStreamAudioDestinationNode, 0, 0);
  _MediaStreamAudioSourceNode.connect(_ChannelMergerNode, 0, 0);
}

</script>
</head>
<body onload="boom();"></body>
</html>
