Overhere a great video of Qui Robinez showing how to use an ipad in combination with a keyboard. (Kronos)
Here is another one...
This is my favorite app, it is named TouchOSC. You can create a whole interface by yourself that controlls midi CCs. Creating your knobs and sliders and buttons to controll your keyboard..
So lets make this a nice topic, showing off how we and others use the ipad to really add something to your setup..
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Yamaha Genos, Roland Jupiter 80, Ipad pro.