What do you guys think about allowing the djay4 to be controlled by a djay2 on ipad? In other words: turning your ipad into a turntable, your mac into a mixer?
That would be something AMAZING, and I really think that you guys would be one of the first to do it!
djay 2 for iPad is a stand-alone app. If at all, then it will be a separate remote app. 
