     }
     
     func shiftDown(sender: KeyboardKey) {
+        self.playKeySound()
+        
         if self.shiftWasMultitapped {
             self.shiftWasMultitapped = false
             return

    }
    
    @IBAction func toggleSettings() {
        if let settings = self.settingsView {
            let hidden = settings.hidden
            settings.hidden = !hidden

    }
    
    func modeChangeTapped(sender: KeyboardKey) {
        self.playKeySound()
        
        if let toMode = self.layout?.viewToModel[sender]?.toMode {
            self.currentMode = toMode
        }
