Options - Sounds

Play sounds on errors and dialogs

Beeps when something unavailable or error dialogs.

Navigatin sound

Plays navigation sounds of current sound theme.
You can change it from Control Panel -> Hardware and Sound -> Change system sounds.

Play sound on Copy, Cut, Paste, and Delete

Specify wav file paths to play when you perform file operations through QTTabBar.

Play in System Audio Session

Uses volume of system sounds.