title: Web Speech API filter audio input
body: <p>I am using Web Speech API for a chrome extension. <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API" rel="nofollow noreferrer">Link</a></p>
  <p>What I want to do is filter the audio being sent to the recognition instance. Does anyone know of a way to do this? The API really only gives you controls to the output of the recognition.</p>