Hi Mike,
Out of curiosity, I spent a few minutes to configure Genos to work with St Just Organ iOS app.
St Just Organ app with Genos (Port: Right1, Channel Port1 Ch1)
https://photos.app.goo.gl/rxNHNDPQSnbjSz1P7Connection: Apple Lightning USB3.0 Camera Connection kit to a powered USB 3.0 hub with 10 USB 3.0 ports, which connects to a iRig MIDI 2, with MIDI in port connected with a MIDI cable from Genos MIDI A out:
https://photos.app.goo.gl/PDCRTc2bckDKeQ7M7Short video showing St Just Organ apps working with Genos through MIDI A out channel 1 for Great channel as a start (please excuse me for my bad demo since I was in a hurry just to show it worked):
https://photos.app.goo.gl/Kda21hzg1Y7qzdkW7I did not try the Swell (MIDI channel 2) and Pedal (MIDI channel 3) since I have only one iRig MIDI 2 iOS interface.
For organs:
Great: Lower manual / keyboard
Swell: Upper manual / keyboard
Pedal: Bass note pedals
With V-Console for Genos, I am using Genos as Swell (upper keyboard), Kronos 2 88-key as Great (lower keyboard), and JG3 24-note pedal as Pedal.
If I want to configure the keyboards and pedal correctly for St Just Organ app, I will configure:
Genos as Swell, using MIDI A Out, with Right 1 using Port 1 Channel 2,
Kronos 2 88-key as Great, using MIDI out Channel 1,
JG3 24-note pedal using MIDI out Channel 3.
Each of these MIDI connections requires an iOS MIDI device such as iRig MIDI 2. So you will have to buy 2 more iRig MIDI 2, or one iConnect MIDI2+ to connect to the powered USB 3.0 hub that the iPad/iPad Pro connects to. The MIDI connection concept of St Just Organ is similar to that of V-Console for Genos, except that V-Console uses USB 2 MIDI port 8 to communicate with Genos.
Thanks,
Paul