If you set up say a 4 voice performance as above with an editor. Can you then play that performance from the keyboard? Without a computer daw etc. ...

I think you have misunderstood. I used the multi-effect controller input to TEST the Yamaha FC7 to make sure that is not the problem. It works fine...

i plugged the FC7 into my zoom multi effect, set it to a wah effect and played through it. used the FC7 pedal and it worked as expected like a wah pe...