         statusLabel.text = "Keyboard Octave Up"
         keyboardOctavePosition += 1
         octavePositionLabel.text = String(keyboardOctavePosition)
+        redisplayHeldKeys()                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
     }
     
     @IBAction func holdModeToggled(sender: UIButton) {

        statusLabel.text = "Key(s) Released"
        keysHeld.removeAll(keepCapacity: false)
        midiNotesHeld.removeAll(keepCapacity: false)
    }
    
    func toggleKeyHeld(key: UIButton) {

        keyboardOctavePosition += -1
        octavePositionLabel.text = String(keyboardOctavePosition)
        // update Keyboard keys held/etc
        redisplayHeldKeys()
        
    }
    
    @IBAction func octaveUpPressed(sender: UIButton) {
