Very good responses everyone. Thanks very much Frank, Mac, and everyone.

To be clear, I am maybe "intermediate" (playing for two years, in two bands) and play saxophone. I am just getting into jazz, and am working on learning chords, and was hoping BIAB could be a tool to help me do that. Yes I know the 7 chords, but sometimes I just want to jam along to a new song which contains many other, more complicated chords/scales. If I could see the notes in each chord, I think I could learn the song much faster than just 'shedding for hours to tediously memorize obscure chords.

Ray is right that the correct answer is "go learn all the chords", but I am always looking for ways to make learning better, faster, and more fun.

The only way I really see to do what I want it to put LYRICS into the song with the scale notes. I would have to do it manually, of course, which would take some time for each song, and would prevent me from being able to just jump in and play. Too bad there isn't a way to script plug-ins for BIAB; I'd be willing to write that.