title: javascript simple Audio Volume meter
body: <p>I am looking for a very simple audio meter implementation in Javascript. 
  I came across this:
  <a href="http://www.smartjava.org/examples/webaudio/example2.html" rel="noreferrer">http://www.smartjava.org/examples/webaudio/example2.html</a> </p>
  
  <p>This is a good example, but unfortunately, it is using Web Audio API (here is more info): <a href="http://www.smartjava.org/content/exploring-html5-web-audio-visualizing-sound" rel="noreferrer">http://www.smartjava.org/content/exploring-html5-web-audio-visualizing-sound</a> </p>
  
  <p>This works fine, but not on all platform; for example IE has no support for it whatsoever. 
  <a href="http://caniuse.com/#feat=audio-api" rel="noreferrer">http://caniuse.com/#feat=audio-api</a></p>
  
  <p>Any idea how can do this in HTML5 using javascript? </p>
  
  <p>I want it to be really simple. I don't need for it to be accurately representative of the volume. All I want is just to be able to have some bar moving, when the audio is on.</p>