Add audio file to a playlist
- warning: Illegal offset type in isset or empty in /usr/www/users/esslin/cms/includes/bootstrap.inc on line 997.
- warning: Illegal offset type in /usr/www/users/esslin/cms/includes/bootstrap.inc on line 998.
- warning: Illegal offset type in /usr/www/users/esslin/cms/includes/bootstrap.inc on line 1002.