Weird problem

I am hearing what sounds like a notification sound on my Windows 11 PC, but only when I am in a cubase project. I have turned off all notifications off, have even installed a program to turn off all the start up programs. It has got me baffled. If anyone has any ideas what this is and how to stop it, it would be much appreciated!!

Maybe if you open the Windows Volume Mixer it will give you some clues as to the source.

Thanks, I turned off sound from my 2 cameras and it stopped. Still don’t know what made one of those cameras make the notification. Once again, thanks!