code: function() {
        var self = this || Howler;
  
        for (var i=self._howls.length-1; i>=0; i--) {
          self._howls[i].unload();
        }
  
        // Create a new AudioContext to make sure it is fully reset.
        if (self.usingWebAudio && self.ctx && typeof self.ctx.close !== 'undefined') {
          self.ctx.close();
          self.ctx = null;
          setupAudioContext();
        }
  
        return self;
      }
docs: Unload and destroy all currently loaded Howl objects.
  @return {Howler}