         menu.addItem(NSMenuItem(title: "Quit VolumeRelay", action: Selector("terminate:"), keyEquivalent: "q"))
         
         statusBarItem.menu = menu
+        
+        // set up notifications
+        increaseNotification.title = "Increasing Volume"
+        increaseNotification.informativeText = "Turning up the volume for audio device"
+        increaseNotification.soundName = nil
+        increaseNotification.contentImage = NSImage(named: "VolumeUpImage")
+        
+        decreaseNotification.title = "Decreasing Volume"
+        decreaseNotification.informativeText = "Turning down the volume for audio device"
+        decreaseNotification.soundName = nil
+        decreaseNotification.contentImage = NSImage(named: "VolumeDownImage")
         
         // volume key listener
         volumeTap = SPMediaKeyTap(delegate: self)

            audioObjectPropertyListenerBlock)) {
                print("error while adding audio device listener")
        }
        
        // set up notifications
        increaseNotification.title = "Increasing Volume"
        increaseNotification.informativeText = "Turning up the volume for " + airplayDeviceName
        increaseNotification.soundName = nil
        increaseNotification.contentImage = NSImage(named: "VolumeUpImage")
        
        decreaseNotification.title = "Decreasing Volume"
        decreaseNotification.informativeText = "Turning down the volume for " + airplayDeviceName
        decreaseNotification.soundName = nil
        decreaseNotification.contentImage = NSImage(named: "VolumeDownImage")

    }


    
    func setupVolumeKeyTap() {
        print(getAudioOutputDeviceName(getDefaultAudioOutputDevice()) + " (" + getNameOfActiveDataSourceOfAudioDevice(getDefaultAudioOutputDevice()) + ")")
        if let index = airplayDeviceNames.indexOf(getNameOfActiveDataSourceOfAudioDevice(getDefaultAudioOutputDevice())) {
            increaseNotification.informativeText = "Turning up the volume for " + airplayDeviceNames[index]
            decreaseNotification.informativeText = "Turning down the volume for " + airplayDeviceNames[index]
            volumeTap.startWatchingMediaKeys()
            if let button = statusBarItem.button {
                button.image = NSImage(named: "StatusBarButtonImageEnabled")
