title: Is there a way to detect audio frequency in HTML 5 web audio API?
body: <p>I would like to know is there a way we can detect audio frequency from microphone in html 5 web audio. I wish to make an online guitar tuner, and I need to have the audio frequency in hertz, from the sound input. I've seen some EQ and filters effects, but I didn't see anything about frequency recognition.</p>
  
  <p>EDIT:
  I found this: <a href="http://www.smartjava.org/content/exploring-html5-web-audio-visualizing-sound" rel="nofollow">http://www.smartjava.org/content/exploring-html5-web-audio-visualizing-sound</a>
  The 2nd point (analyser node) is really interesting. I seen his source code, but I can't figure how to connect the analyser to the microphone input.
  He calls a playSound() function when the mp3 file starts to play, and there he draws his canvas. But I do not have a playSound() like function...</p>