MainStage in conjunction with HomeConcert Extreme

Question

Presently: I play an acoustic piano, and tap my foot to deliver tempo to HomeConcertExtreme.
HomeConcertExtreme then compares my foot track to 32 other orchestra tracks from an open MIDI file. It then activates the notes from theres orchestra MIDI tracks and sends them on their way via 2 (16 each) IAC Driver Busses.
Logic picks up this income MIDI messages, de-mixes them in its environment (bypassing Logics Sequences completely) and send them to its audio,, and out.
FUTURE: I would like to replicate this outcome in MainStage, and have been told that MainStage is optimized for live performance better then LogicPro.
I have created a great set up with 32 icons, channels and meters in MainStage... However I have been unable to De-MIx the audio.
In the edit window... there is no way to assign a Channel Strip Instrument to a specific IAC driver Bus CHANNEL. I can only assign it to a keyboard.
How do I de-mix 16 channels (twice, once for each bus)?
Do I have to create 32 mini keyboards one for each Bus/channel?
A single keyboard with 16 layers does not cut it.
Please help me de-mix from my IAC Driver Busses.

Answer 1

I figured it out at last.
I had to create 32 mini keyboards. Each one receiving only a single channel from a single bus.
I then mapped each channel strip to a single keyboard.