With 2 midi devices, I would use a 2x2 Midi>USB box and have had solid performance with a Motu Fastlane USB 2x2. Using midi thru and daisy-chaining the Roland and the keyboard may work fine, but sometimes, that style of connection can have a bit more delay. In any case, set the Roland brain to Midi Channel 10, and deselect channel 10 on the keyboard's configuration(in the Midi Studio setup window)
