On random occasions I get an audio sound, like an alert, like a doorbell (ding-dong, high pitch to low pitch). It is a full sound, with slight echo and reverb. I don't know what's causing it.
I have gone through all sounds in the Sounds window in the Control Panel. It is none of those. I have...
audacity
audio alert
backblaze
computer audio
control panel
email notification
mysterysound
notification sound
piano recording
random alerts
reverb
sound issue
system sounds
task manager
troubleshooting
user experience
windows sounds