Hi Joe H,
I was refering to the pedal operated hardware (strictly speaking I should have used to term "Foot Controller" rather than Pedal Conroller).
The CCs 72 and 74 are "Sound Controllers" not the MFC10 or FC1010!
It is the Foot Controllers that are not supported on the SX series - unlike the Tyros models which did support these pieces of hardware.
If you know a way to do this, then I am sure the OP would appreciate your answering his question with instructions as to how, as indeed I would, as my FC1010 is now lying redundant since I changed my Tyros for the SX900.
We await your instructions with eager anticipation.
Alan.