In the application menu, click on Config->Audio Setup You should see the following dialog:
Create a text file containing the list of audio files you want to use with Roball. Here is an example of configuration File:AudioSetup.txt. Use absolute path names for files. Audio files must be of type WAV, MP3 or AAC depending on your installation.
Click on "Load List" and select the text file containing the file list. The dialog should now look like this :
