Most of the full-range instruments in Trilian appear to have velocity switched articulations. However, other than a one-line note in the browser they don't seem to be documented. Even if they were documented they aren't all that useful to a non-bass player. They basically produce unpredictable results unless you spend time trying to decode the velocity switches.
Most of them say "12-x velo switch from Clean -> Vibrato -> Character -> Gliss Up". Is that really how a bass sounds as you play progressively louder? Somehow I doubt it.
Is there any way to just turn these articulations off? I haven't been able to find it. Also, I'm aware of Live and Stack modes. However, those still doesn't really help a non-bass player.