MIDI OUTPUT: if extra midi devices are plugged in your computer, they will appear in this window.
Otherwise you use virtual midi devices appearing in the INSTRUMENT window.
MIDI CONTROL: if midi controllers (pedals, footswitches, faders…) are plugged in your computer, they will appear in this window.
The rear standard jack outputs (as well as the the phones output) let you listen to the raw signal or the processed signal depending on the DIRECT MONITOR switch position:
- push: you hear the raw signal coming from the INST 2 input
- pull: you hear the signal processed through MG2.
Courage! That will come 