Torque, along with many other game engines, uses OpenAL—an open-source audio API (Application Programmer's Interface). In this book we won't be directly addressing programming with OpenAL, but we do need to ensure that OpenAL is installed with the correct version. The Torque installation procedure you followed in an earlier chapter will have taken care of that for you. In your root main directory, make sure that the file OpenAL32.dll is there. If it isn't, you will need to reinstall Torque. If you use the stock Options menu in the Torque demo games, then make sure you enable the OpenAL interface there.