I really want to thank everyone who has replied here.
I am trying to digest all that has been said here plus all the reading that I did last night. I bought BIAB about two years ago and gave up on it after a month. I'm trying again but it's driving me crazy again. Back when I first got it, I read the manual and all the tutorials, and I've been doing that again for the last couple of weeks. I've read and re-read it. I just printed out; Midi In A Nutshell, Midi Basics, the General Midi Instrument List, the BIAB Channel List, and the tutorial on Audio/Midi Driver Setup, No Sound. I have sound, it's just not the sounds that I'm expecting for the settings I have applied. Plus, I'm having trouble getting my keyboard to play through the synths correctly. I can get it to work after working on it for a while, but the volume is so low I can't play along with a BIAB song that is playing.
Problem is, every time I think I'm starting to understand it, then try something, it doesn't do what I'm expecting, so apparently I still don't understand it. For instance, I just loaded a BIAB song, started it playing, then looked at the synth Control Panel and the various instruments were not on the channels in BIAB's Channel List.
BIAB sometimes turns Local Control Off on my keyboard, a Yamaha CP33, and sometimes it doesn't. Sometimes it works when Local Control is On, and sometimes it won't. Sometimes things seem to be working, then the next time I turn it on, nothing works and I have to spend hours sorting it all out again. It's not consistent.
I've been working on this night and day for a couple of weeks now, and I'm really not any further along than when I started.
I have another VSTi host app. that works just fine with my keyboard, and I use Audacity for audio recording. Works just fine. Even RealBand seems to work correctly, though I haven't spent much time with it yet. I'm trying to get BIAB to work first.
I'm pulling my hair out.