I’m thinking of using either the B1X Four or the G1X Four with a Yamaha digital piano. Which unit might best be used?
In essence the can be made the same. The benefit of an X is you get expression pedal - this doesn't seem to be added on aftermarket. If you want to know how to use midi to control the pedals (from a DAW or Raspberry Pi) check out links and code under here -https://github.com/shooking/ZoomPedalFun