the first thing to check is that the tablet has otg host support ,, ,the controller will not connect to the tablet if this is not possible , recommend getting this main point set up and then maybe trying to get it to a controller to verfiy the functionality of the set up ,, ie setting up the otg in the tablet and useing a controller at the retailer to see it function ,,
reason ,, got a releativly free tablet ,, found out otg host is not supported and info as to being able to root is not clear,,so no monie not lost in endeveor
too my knowledge the audio set up will still involve the use of the DJ splitter cable ,,since to my knowledge the audio hasnt evolved to the point of sending it out over the micro usb connection ,,maybe one day ,, plus Cross DJ app for android is not set up for such
hope this helps with some of your concerns ,,