I'm writing a fast jazz tune which has an 8 bar intro. In the 8th bar I want the rhythm section to do 'hits' on beat 1 and 2 (beat 2 then sustains through the rest of the bar). I tried putting the 2 chords in the 8th bar on beats 1 & 2 and then separating them with a comma in the hopes that might do it, but that didn't work.

Is this kind of thing possible in BIAB, or is it not supported?

Thanks.

Zac