CC can stand for control change or continuous control. It means "adjusting parameters in real time on the preset somewhere without changing the program #."
PC = program change.
Program change is the most basic, and it's what I use exclusively.
program change = you're in bank 1, and you hit switch 5, it sends program info 5 to anything on the correct receiving channel in the midi chain.
It's sorta complicated unless you're just using one device and leaving the midi channel on "omni".
I love the ADA MC-1 as all the switches are in one easy row!
I have two and will NEVER sell them. I used them with the VH4 I owned and the phantom powered the ADA perfectly!
7 pin din cable is all that's needed. Done!