Let me know what you find! I am in the market to purchase a keyboard to learn how to play and read music. I had my sights set on the CT-S400, but I have a rare opportunity to score a CT-S500 for just a tiny bit more. I was really looking forward to using the Chordana Play app, so I hope there's a way... I don't want to give up the opportunity to get the CT-S500, and then regret it.