Use this section to set sound notifications to be played when the backup is finished. There are three types of sound notifications depending on the backup status: success, warning and error.
Enable sound notification
If checked then success, warning and error sounds will be played at the end of the backup. By default this option is not checked.
Success
It indicates the sound that will be played when the backup is finished with success. The default sound is <Default beep sound>, but you can change it using the Open button 
. If you press the Play button 
you can hear the selected sound file. To disable this sound you can select from the drop-down box <No success sound>.
Warning
It indicates the sound that will be played when the backup is finished with warnings. The default sound is <Exclamation sound>, but you can change this using the Open button . If you press the Play button you can hear the selected sound file. To disable this sound you can select from the drop-down box <No warning sound>.
Error
It indicates the sound that will be played when the backup has failed because of an error. The default sound is <Asterisk sound>, but you can change this using the Open button . If you press the Play button you can hear the selected sound file. To disable this sound you can select from the drop-down box <No error sound>.
Open sounds
This button will open the standard Sounds and Multimedia Properties->Sounds window of the operating system (that can also be opened from the Control Panel). You can use this to configure or troubleshoot your sounds settings.