Polynizer: see what you hear

I can see this being useful, but it needs some work. I loaded an mp3 file of an organ part I am trying to learn. It is just the organ, no other instruments to filter. I’m on an iPad Air 4. The piano roll is so light and small I can hardly see it. That needs to be brightened up a good bit to make it visible. I like that you can slow it down, but it is just too hard to see. Hopefully the developer can fix this or offer a way to adjust the view. It would change my rating considerably. It is also possible that the app is confused by the Wurlitzer effect on organ parts.