The best software bass I have heard IMO is Trillian from Spectrasonics. This is a fully featured set of basses in both acoustic and electric (many types). The acoustic double bass is stunningly real and features slides, stacatto finger fumbles and a host of other articulations. TO program a 'real' sound takes more than just good software there is so muich to 'feel' that the real musician does unconsciously but which really adds to the dynamism of the sound. Its much more than mere velocity. The weakness of many bass synths particularly keyboard basses is that you only get one sound per note - its simply not enough tm emulate, although it may be a good sound in its own right.

In a real insturment every sound is a universe. As a sax player I do not believe that I have ever played the same note twice - in oscilloscope terms even thnough I have been playing many years. There is stuff we do with our fingers as they leave the fret, the sound of an open string is different ot a fingered one, stacatto is much more than only one way to shorten a note, where we touch the string is also a factor, how it bounces, attack is also very variable and not simply a small range of types as is the way we end a note. The way we instictively put a run together is a hard wired thing in the subconscious mind and is only partilally controlled by the intellect, if we want to program this we must understand hte little things that make a lick so alluring - its often the fumbles the slight variations in rhythm that makes the sound so appealing.

Unfortunately I do not know a way to plug this in to BIAB

ALL IMO