Hi,

From evaluating the Ground Control's manual I believe you will have to use the Instant Access feature in the Ground Control to assign the Proper MIDI CC values to footswitches 1-8 on the ground control. The MIDI Implementation guide for the DT50 is listed in your Pilot's Guide on the last page.

http://line6.com/data/6/0a060b316ac34f059348b7e6f/application/pdf/DT50%20Quick%20Start%20Guide%20-%20English%20%28%20Rev%20C%20%29.pdf

I would suggest you contact Voodoo Lab about setting up the pedal:

http://www.voodoolab.com/contact.htm

Or reffer to the manual for your Ground Control:

http://www.voodoolab.com/manuals/gc_origv2manual.pdf

Thanks,

David

Line 6 Customer Support