Hi there !
I use Ground Control Pro and it works perfectly well
( if it is running firmware 1.13 )
Firs of all : MIDI OUT from Ground Control ! MIDI IN to KPA .
Choose 8 - 4 button figuration on Ground Control unit.
You have to adress each button on GCP to the corresponding MIDI channel the
"stomp boxes" use in the KPA according to Kemper manual MIDI chart.
For example : Button 1 CC 17 for stomp A . Button 2 CC 18 for stomp B and so on ...
Voodoo Labs has a manual that is useful ...
http://www.voodoolab.com/manua…nd_control_pro_manual.pdf
The main "trick" is that if you have one or more stomp boxes activated in a rig
you have to activate the corresponding buttons on the Gr.Contr. as well and
THEN save that setting within the Gr. Contr. ´s memory " Save ? Yes / No ...
The LED´s on Gr.Contr. should then light up when that specific rig is on.
If you change Stomp settings on KPA and store them, you have to change and store
the same settings ( buttons 1 - 8 ) on the Gr.Contr. as well
Been awhile since I was "struggling" whit this so my memory might have som glitches,
but you will find what you need in the manuals and there´s also some discussions here
on the forum ........ somewhere .....
Good luck !