Just a quick comment around the discussion of "dull chord sounds", assuming some need for BiaB to adapt and provide them. From what I can tell as a relative newcomer to using this tool, is that BiaB covers almost all of the chord families, making their sounds available, as described by composers in standard notation form, with a couple of exception. I in Major, and Minor are full covered. II in Major and Minor are almost fully covered, including their IV substitutes. V is fully covered in Major, mostly in minor.

The areas of difference are the upper extension sounds in II minor, and the various forms of V in minor, as well as ways of stating chromatic sounds, mostly reflective of Minor uses of built up chord Shapes in upper extensions, augmented, and diminished sounds. These get fairly difficult to pin down with a chord name.

One area BiaB could adapt is to enable polychord notation, triad on top of a triad, and or triad over a four note chord. It gets close with the chord over base note. But as far as finding chords that aren't quote dull, unquote, what can you be looking for other than some triadic/quartal shape, or inversion of one, over a base note, or interval?

As an old foggie, I think they've got what I need covered, until I get a film score assignment. But I would like to know more about what people are hunting for asking for more "modern chord sounds".