         auContainer.addSubview(au)
         auContainer.contentSize = au.frame.size
         currentAU = au
-
     }
 
     public func loadInstrument(_ name: String) {

    }

    public func showAudioUnit(_ audioUnit: AVAudioUnit) {

        if currentAU != nil {
            currentAU?.removeFromSuperview()
        }

        }
    }

    func audioUnitManager(_ audioUnitManager: AKAudioUnitManager, didRemoveEffectAtIndex index: Int) {}
}

extension ViewController: AKKeyboardDelegate {
