A quick video demo, made by a friend. I just gave it to him like that, without much explanation.
The user manual is still not ready (blame me) but he managed to catch the thing even though he only used a few of the features.
I'm not sure now whether your plan matches what has already been implemented with the MBSID. There are 4 sound engines, take a look here:
Lead Engine
Bassline Engine
Drum Engine
Multi Engine
http://www.ucapps.de/midibox_sid_manual.html