How to use a fader as a mod wheel if you have a Roland keyboard
Unfortunately, many Roland Keyboards still use the pressure stick for modulation. The good news is that you can use any fader or knob capable of sending MIDI CC data in place of the mod wheel.
We have a tutorial on this here:
If you don’t have a fader or knob, you might check out the Korg nanoKontrol 2 here.