So IAC driver feeds to BBvia the coreMIDI, and how would you bounce that track?
It would be external, so I'm not seeing what purpose it hold, other than say practicing. I suppose you could export BB's as SMF and import in to you host, but that would defeat the purpose, or not . Depends on what the goal is I suppose.

Eric, if BB went to a full fledged DAW which it seems to by your description of adding audio capabilities, we would eventually loose what BB is all about me thinks. I wish PG Music would beef up what BB is about in wider genre's. By this I mean being able to write/work some real tunes. The realtracks stuff seems to be a good movement, but is stuck in blues or jazz, country, rock. At least from what I can tell-sorry I have't delved too much into that stuff yet. Perhaps the styles stuck in 4/4 or 3/4 is what's holding it back? The styles seems to keep you in a certain vibe, thats too straight.