The YouTube godz smiled upon me and sent this recommendation: How to setup an expression pedal or midi controller with Amplitube and Bias FX - YouTube
I tried creating a MIDI track when I was 1st trying to figure this out but must have had the routing wrong.
I haven’t played around with it much yet but it works now! You record on both the midi track and audio track simultaneously. I hadn’t thought about it in terms of recording the midi separately (thought it would record the wah-ed audio) but this certainly makes more sense.
Hope this helps