Ah, OK interesting! I'm sending the MIDI data via Lemur/iPad/iRig out. MIDI learning a bunch of parameters (40 or so each?) on one plugin on 8 separate tracks. Each "set" of MIDI learn data has its own MIDI channel.
What's happening currently: I set everything up, the MIDI learned parameters respond perfectly when all the tracks are selected. When the tracks are not selected (as in selected the track via mouse on the TCP), they no longer respond to incoming MIDI data.
Perhaps I'm missing a preference somewhere or something along those lines? Or something extremely basic... it's happened before!
Thanks for your help!