I just bought Mfx Pan, and I can't get it to work. It seems simple enough. I've tried it in Cubasis under the "Midi FX" section, and in Aum, where it can be checked as the controller for the synth being used. I've also tried having the keyboard and Mfx Pan control the desired app separately, and I've tried putting the keyboard in front of Mfx Pan in controlling the synth.
I can't figure out any way to get Mfx Pan to produce any type of pan effect, and I've tried a few different things so far. I can't tell if it's just broken in general, or if there's some mechanism I'm not understanding. I'm using a 10.5 inch 2017 iPad Pro on the latest firmware update.