How to turn on/off sound notifications
Sound notifications for Front can be turned on/off in your computer settings. Instructions differ for Mac and PC.
Open System Preferences and select Notifications.Step 2
Choose Front and check/uncheck Play sound for notifications.
Windows (might be different depending on your machine)
Open the Control Panel.
Click Hardware and Sound, and then select Sound.
In the Sound window, click the Sounds tab.
In the Program Events section, find the sound you want to disable or change. Then, in the dropdown list in the Sounds section, select (None) if you want to disable the sound or select a different sound file if you want to change the sound.
Click OK, and Save or Yes if prompted or to save the settings for the currently selected Sound Scheme.