var context;

  var request; 

  var source;

​

  try { 

    context = new (window.AudioContext || window.webkitAudioContext)();

    request = new XMLHttpRequest(); 

    request.open("GET","http://jplayer.org/audio/mp3/RioMez-01-Sleep_together.mp3",true); 

    request.responseType = "arraybuffer"; 

​

    request.onload = function() { 

      context.decodeAudioData(request.response, function(buffer) { 

        source = context.createBufferSource();  

        source.buffer = buffer; 

        source.connect(context.destination); 

        // auto play

        source.start(0); // start was previously noteOn

      }); 

    }; 

​

    request.send(); 

​

  } catch(e) { 

    alert('web audio api not supported'); 

  }