title: How to use Web Audio API to make sound like guitar, piano etc
body: <p>I want to use Web Audio API to simulate sound like guitar or something.
  Currently, I am using OscillatorNode to make sound by changing frequency. 
  But I have no idea which node should I use and how to use it to make sound like guitar or something. Should I change waveform or what? and how? </p>
  
  <p>Here is some reference 
  <a href="https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html" rel="noreferrer">https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html</a></p>
  
  <p>Thanks!</p>