title: Starting a Sound at a specified position with CocosDenshion?
body: <p>It's possible to do stuff like:</p>
  
  <ol>
  <li>Reproduce a sound at a specified starting position</li>
  <li>Reproduce a sound for a certain ammount of time</li>
  </ol>
  
  <p>Using CocosDenshion ?</p>
  
  <p>If so, how ?.</p>
  
  <p>If not...i have any alternatives, like a different sound engine or a certain class in the SDK that would allow me to do both things ?</p>