Just got a new SL88 Studio by studio logic Masterkeyboard just to find out that Studio One seems to not support it! and worse, this seems to be an old issue that seems to be unsolved since more than 2 years! Do I miss something here? Connection via usb, newest version of S1 and newest firmware of SL88. Logic Pro, Bitwig, Protools work more than fine with this keyboard. If there is no solution  maybe it is time to say goodby to Studio One+....