This app plays a sound on new notifications and private messages. With the new user setting you can allow only specific usergroups to use this feature. This is a great way to monetize your site.
Features
User can choose from 4 Sounds
Plays sound on notifications
Admin can change soundfiles
Users can choose their sound settings via user menu
Users can disable sound notification
Testbutton
Demo:
Login: user@scheinwelt-media.de pass: 123456