Sound notification when client enters waiting room

We can’t seem to get to give us a sound notification on our computer when someone enters the waiting room and we are not expecting them. We have Desktop Alerts ON and Check In and New Message sounds set. We don’t want a text or email; we want to hear a sound on our desktop. Is this not working because we have the free version? Would it work with the paid version? Please let me know asap as this is a big problem for us. Thank you.

I agree this would be a useful feature. I have not figured out how to do it either.