You can't expect too much from something like this other than a nice background pad. I use various vocal patches on my keyboards all the time and it's a real skill to control them with a pianists touch. An example is the ooh's are one layer and the ahh's a second layer that could be mixed with something else for effect. I would be playing a chord lightly triggering the ooh layer only but while holding that chord I use one finger for example to trigger the second layer loudly making it stand out. Hard to describe but that's how you make vocal patches sound real.

This isn't a bug in Biab or anything, it's just the way it works. Biab has no way to adjust the volume (velocity) of one note in a chord to trigger a variation of the sound so pad sounds like this will sound sterile. All you can do is be careful how you mix them.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.