An App I'm working on is kinda like an appear-as-you-touch piano.Using AudioKit and the gesture recognizing I have my app set up to:make a new button appear when the user touches the screen(Essentially, I have my ViewController.swift which makes new CircularKeys every time the user taps.)turn on an oscillator and get it going in the ViewController via a UIButtonNow I'm trying to get some more dynamic functionality: I want to start an oscillator for each new key that exists on the screen, and I'm wondering how I can keep track of them.  AudioKit wants to know all the outputs before it will feed them out with AudioKit.start() and I am thinking about using NSMutableSet to keep track of the oscillators.Basically: I want to couple together Oscillators and CircularKeys.  What are some design strategies that play nice with iOS philosophy?
multitouch application, creating custom UI elements, and stacking oscillators with audio kit
ios;project structure