What I'm about to tell you is a secret that flies in the face of Apple's rules for developers. I have permission to tell you about it, but you absolutely cannot tell anyone else! Pinky swear?
For those of you who haven't been following recent developer developments, Oprhion and Cantor were suddenly targeted by Apple for removal from iTunes if they did not stop using a Private API. They were both using this bit of code to add more expression while playing with the on screen controls. Essentially they had finer finger-sensing data than is typically available to apps, so slight movements by your fingers could add articulation like vibrato.
Apple's decree came after more than a year since the apps first debuted on the App Store. Cantor specifically mentioned that they were using the Private API at the top of all of their app review submissions, so they weren't trying to sneak anything past Apple. But Orphion is now!
If you update to the latest version of Orphion, which was supposed to have removed this extra functionality, you'll find it is still available in an Easter Egg!
All you need to do is scroll over to the last of the help pages and tap on the version number. This will unlock the contraband code!