Right, I see maybe why the acoustic Bass in the Microsoft synth sounds identical to the bass in the VSC DXi synth, Thanks. I'll stick with the VSC DXi synth and get the upper banks too. The Roland TTS 1 GM synth that comes with Cakewalk Music Creator 5 sounds good too, for $35.
Actually sending output to the FR7 (Roland MIDI accordion) is possible but not recommended by Roland, it does not have GM compatible sounds and is meant to be more of an "input" instrument. So in my case I would record the audio output of the accordion as I am playing it live over a BiaB background. If I am step-entering or real-time entering a bass line or such into BiaB, I prefer to use the Keyrig Midi keyboard for that purpose. Not because I can't do it with the accordion, but because it is so much easier and quicker. Using the FR7, along with its attendant external expander box that is necessary for MIDI, is like donning an astronaut suit to enter MIDI data. I'm sure the folks at NASA would never, ever consider entering MIDI data without first putting on an astronaut suit, but I like to do it the easy way.

Here's my latest learning frustration: When I have the MIDI controller keyboard selected as an input device in BiaB, I would expect that with whatever part I have selected, then it's associated instrument, weather it is GM or VSTi sound (not RT of course), would be heard when I play, or hit any key on the keyboard. But this doesn't happen. (with BiaB playing back or not). It doesn't matter what I have selected as an instrument, the generic (piano or computer-speaker like) sound is output when I play on the keyboard. However during playback the correct patch will be assigned. Is this normal or can I fix that?

WinXP Pro / BiaB 2010 / Fast Track Pro / Ketron SD2