i found this app by chance, and it is now the central tool i use for managing my keyboard rig, and for coordinating performances with my bandmates. it has to have been designed by a performing musician, because it does literally everything you need to control your charts, rehearsals, midi commands, patch changes, notes, lyrics, etc. during a live performance. the developer is a real pro, extremely responsive, and incorporates your suggestions and recommendations almost instantly. i wish all app developers were this good at customer service. i have recommended this app in person to over 50 musicians at gigs, including sound and lighting techs, and every one of them has downloaded it, and now uses it all the time. this app makes having an ipad truly indispensable at a gig!