Diki,
The Performance Editor is a very useful app. It provides easy access to the tools needed to tweak sounds and EQ settings. In my opinion Roland should have built this ease of use into their OS. it will no doubt make it a lot easier, especially for Roland OS newbies, to make adjustments to the keyboard. A major complaint though is the App really eats up the Ipad's battery. Yes, thee is a Wi-Fi system available - but again - why should owners have to shell out even more money for items that are really unrelated to the keyboard? Roland needs to seriously rethink all of this. By the way, I don't think the double screen is all that helpful either. Why not a great touch screen like the Korgs have?

Deane