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# System Sounds

## Topics

### Constants

[`kSystemSoundID_FlashScreen`](/documentation/AudioToolbox/kSystemSoundID_FlashScreen)

On the desktop, use this constant with the [`AudioServicesPlayAlertSound(_:)`](/documentation/AudioToolbox/AudioServicesPlayAlertSound(_:)) function to display a flash of light on the screen.

[`kSystemSoundID_UserPreferredAlert`](/documentation/AudioToolbox/kSystemSoundID_UserPreferredAlert)

On the desktop, use this constant with the [`AudioServicesPlayAlertSound(_:)`](/documentation/AudioToolbox/AudioServicesPlayAlertSound(_:)) function to play the alert specified in the Sound preference pane.

[`kUserPreferredAlert`](/documentation/AudioToolbox/kUserPreferredAlert)

A deprecated sound identifier.


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