...and the final product sounds a lot like the old TC harmony technology: mechanical and computer-ish
The TC-Helicon was added in BIAB 2004, then enhanced a little in BIAB 2005, and as far as I can tell, has been pretty much the same ever since.
It would be nice if the harmonizer could be updated with newer technology (perhaps a cooperative arrangement with zPlane or even a new arrangement with TC-Helicon); however, it does seem that most harmonizers have gone to hardware, live-performance orientation.