title: How to split and trim audio files in browser
body: <p>I need to build a feature in my react.js app that allows users to trim and split the audio files they upload. I know this can be done, as web apps such as Youtube allow editing of video/audio files right in the browser. But I'm not sure where to start. Would appreciate any ideas.</p>
  
  <p>Would also welcome suggestions as to how to do this on the backend with node.js, i.e. modules to use, etc.</p>