KORG PA4X 76 - Manual (Page 756)

752| Controllers
Programming the EC5 multiswitch
Programming the EC5 switches
You can connect a KORG EC5 multiswitch controller to the EC5 connector
on the back of the instrument. This will give you a set of five programmable
switches.
1 Connect the EC5 multiswitch to the EC5 connector.
2 Go to the Global > Controllers > EC5 page.
3 Use the A…E pop-up menus to choose a control function to each of the
switches.