I gave it a try on the simplest option
Open a 4 measure trio intro in band in a box 2013
Then added a couple of chords for 8 measures...
Unfortunately the song plays only the 4 measures of intro back to back although the song is supposed to play measures from 1 to 12

I am surprised that this question did not get a reply from the PG music software designers... They should be able to tell us if it feasible or not to use a trio intro in a BiaB song, just a thought...

J-Louis


J-Louis Belard, BIAB2018, Windows7 Pro