Audio Output
Any connected audio interfaces will show up under Visibox > Preferences > Audio Output. The first item in this list will simply default to the audio output you’ve chosen in your system settings. You may just use your computer’s built-in output with Visibox. But if you have a higher quality audio interface that you want to use, you could set your system settings to use the built-in audio output (probably the built-in speakers on your laptop), and then set Visibox to use your external audio interface. This will ensure that any alerts or messages that you receive on your computer will come out of your internal speakers and not accidentally go out to the audience.
If you have an audio interface connected for performance, it’s usually a good idea to leave the system audio going through the internal speakers while any audio from Visibox goes through your external interface. This way, any system notifications, sound effect, or other noises don’t go out to your audience.