Steps to reproduce:
- Log in as a user and go to a forum.
- Click to add a new discussion and verify you see the Atto editor.
- Click the Insert Media icon.
- Click the "Audio" tab.
- Browse and upload an mp3 file from your computer.
- Insert the media. You'll see the media control in the forum.
- Select the mp3 control (you may need to use the keyboard to select it, at least that's the way of selecting it in Ubuntu).
- Click the media button and access to the 'Advanced settings' tab.
- The 'Show controls' option should be checked.
- None of the 'Advanced settings' is checked.