Citation:
The X3L does generate Control Change (CC), Program Change (PC), and SysEx midi data. For instance, when you turn a knob on the X3L, it can send a CC message through the midi out port. When you change presets, the X3L sends a Program Change message. etc.. So, what ever other device, or software you have can, in effect, be controlled by the X3L. The X3L does not generate any Note Change midi messages, so you can't use it to generate midi notes like a keyboard controller. Though it is possible to use the CC, PC, and SysEx messages from the X3L, to controll other things, it is a rather complicated process.