All of that stuff with Chainer is great, Prado but it doesn't address the program changes problem with Biab. The deal is Biab will throw in a program change in the middle of the song depending on the style and/or substyles that are happening. Since Biab is doing this in real time, any synth that is loading large samples like any of the ones being mentioned here including all the other big name samplers like Kontatk, Halion, EMU X, whatever will completely lock up Biab because there is no time to load that sample. Read the other thread asking about higher banks in the Forte DXi. A dedicated GM soft synth will load the entire GM soundset into ram so they are instantly accessable by Biab. The key word here is instantly. If it even takes a half second to load a new sample in order to answer a program change, Biab will completely lock up. We have had detailed discussions here in the past about this. It would be good if Biab were to change instruments in the middle of the tune, it changes midi channels too so you could set that up but what happens is a particular style may switch from say a nylon rhythm guitar to a steel rhythm guitar when it gets to substyle C or whatever. That switch happens on the same midi channel and ST only has one instrument on any one channel but Biab has two in this example. A GM bank that has been loaded into ram will handle that with no problem.
When you're using a full DAW every instrument is on it's own track and midi channel so that's not a problem because those program changes are not happening in real time, you're setting that up ahead of time before you hit the play button.

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.