Mac making strange alert/notification sounds with all notifications turned off
My Mac Mini M1 makes a strange custom alert sound randomly throughout the day. I can be sitting right in front of it when it happens and there's no obvious reason for it that pops up. Sometimes it will happen back to back to back, other times I won't hear it for a day or two. I have all notifications turned off, and the particular sound it makes doesn't show up as a standard alert sound under the sounds effects screen. I'm on Ventura 13.5.2. What can I do to troubleshoot this issue?
Mac mini