 
     // send note on for notes in the present
     let presentNN = nnCalc(performanceCounter)
-    let frequency = AKPolyphonicNode.tuningTable.frequency(forNoteNumber:presentNN)
+    let frequency = AKPolyphonicNode.tuningTable.frequency(forNoteNumber: presentNN)
     osc.play(noteNumber: presentNN, velocity: 127, frequency: frequency)
 
     performanceCounter += 1

        ) { multiplier in
            osc.detuningMultiplier = multiplier
        })

        keyboard = AKKeyboardView(width: 440, height: 100)
        keyboard.polyphonicMode = false
        keyboard.delegate = self
        addSubview(keyboard)

        addSubview(AKButton(title: "Go Polyphonic") {
            self.keyboard.polyphonicMode = !self.keyboard.polyphonicMode
            if self.keyboard.polyphonicMode {
                return "Go Monophonic"
            } else {
                return "Go Polyphonic"
            }
        })
    }

    func noteOn(note: MIDINoteNumber) {

AudioKit.start(withPeriodicFunctions: sequencerFunction)
sequencerFunction.start()

class PlaygroundView: AKPlaygroundView {
    
    override func setup() {
        addTitle("Microtonal Morphing Oscillator")
