title: How to record audio in format of mp3/m4a JavaScript- recorder.js
body: <p>In recorderjs <code>rec.exportWAV([callback][, type])</code> is used to generate a Blob object containing the recorded audio in WAV format.</p>
  
  <p>But the WAV file is taking large space, for 30sec it is approximately 1mb. So I want to record the audio in format of mp3/m4a which takes less space.</p>
  
  <p>Is there any way to record audio in format of mp3/m4a.  </p>