I am currently trying to create a piano app myself in Swift, but am having some trouble with the response of the keys. On the upper left side of this webpage it says you use UIKit as a framework. What framework do you use to create the music part?
I'm just wondering if it's worth it for me to download the objective-c version and translate it to Swift myself. The problems I'm having with my piano app (AVFoundation) is that there is a latency/delay issue, non responsive behaviour and not able to do precise multi-touch. When I look at your video of this app, it looks exactly what I'm looking for and I'm considering downloading it.
Did you use any other specific framework that's not standard in Xcode? I'm just trying to decide if I should go for it or not.