Cubasis tips and tricks: MIDI THRU with MIDI bridge app
/https://www.steinberg.net/forum/viewtopic.php?f=183&t=31847
So here is the trick: you need MIDI bridge app which allows you to make complex midi routing.
And here are screenshots on how it should be set up:

MIDI Bridge: Connect iRig in with iRig midi out

Choose iRig midi as midi in in Cubasis



