title: Flutter - How do I play ambient sounds?
body: <p>I am developing a flutter app. I want to let the user select some sounds.
  When selected, I want the app to play its mp3 file in the assets folder. I tried with AudioPlayer plugin but I haven't achieved to play local files... 
  I have been searching for awhile and I haven't found any good answer to my questions, furthermore, the posts were created 2 or 1 year ago, so maybe we need an updated answer.</p>
  
  <p>I have found this post: <a href="https://stackoverflow.com/questions/46486475/how-to-play-local-mp3-file-with-audioplayer-plugin-in-flutter">How to play local mp3 file with audioplayer plugin in Flutter</a>
  but my project doesn't find this package <code>import 'package:path_provider/path_provider.dart';</code>  [<strong>THIS PART IS SOLVED</strong>]</p>
  
  <p>And when flutter will have a built-in audio manager? Are they/you working on it?
  Thanks in advance!</p>
  
  <p>EDIT: Also, I would like to play different mp3 at the same time, with different volume. Is it possible?</p>