1. Follow the Event Wizard steps, choose action for 'Enter'
The Event Wizard window will pop up asking you what you want to happen when someone walks into the region: "What do you want to happen OnEnter?"
Choose Play and click Next
If the Event Wizard doesn't appear, repeat step 1 again.
2. Choose action for 'Exit'
The Event Wizard window will now ask what you want to happen when someone walks out of the region: "What do you want to happen OnExit?"
Choose Stop (or one of the other options) and click Next
3. Confirm actions
The Event Wizard window now asks you to confirm your choices for this region. Check that you have told it to Play the sound OnEnter and Stop the sound OnExit
Click Finish