I want to use my Casio CTK-711 ex, which has velocity sensitivity, as a controller for my RX8 drum machine (which doesn't); but I keep running into the issue that the voices on the RX8 are mapped to keys that start below the range of the CTK-711 (C2. Tom 8 on the RX8 is F#-1). I've tried reassigning the voices on the RX8 to keys in the C2 and up range but nothing changes. Do I need to get the firmware on one of my devices rewritten?