If you’re working with H9 Control, start off by making sure the expression input of the H9 is set up to work with your OX9 by going into the “Pedal” tab, and “General Settings”. “Expression Jack” should be set to “Aux Switch”
Then, you can make assignments in the “Pedal” tab, then click “Aux Switch Assignments.” Typically, the Repeat function in our delay algorithms is mapped to the “Performance Switch (Middle)” option. When you select it, assign it to Footswitch 2 (sw2) – if I recall correctly, that’s the switch that corresponds to the left switch of the OX9. Make sure no other parameters are mapped to the same switch.
Now, when you press the left footswitch in the OX9, it should engage the Repeat function of your delay algorithms. Let me know if this works.