Please excuse me for being dense (again, I am new to BIAB and JABB), when you say "go by trial and error", you mean that when I press "see DXi settings" in BIAB and the Kontakt2 player opens up showing the JABB instruments that I have chosen, I need to go to the instrument I want to play the melody (let's say the alto sax), and try changing its channel in the drop down box to a number other than 4 (probably a number other than 2 (piano), 3(bass), 10 (drums), etc.? Is that correct? In other words, I should just keep changing the channel of the sax (maybe a channel from 11-16?) until I hear the sax playing the melody in the song?

Thanks again everyone for your assistance.