In this link below, Reathpd demonstrated using the controller functions of a keyboard MIDI controller to control different functions of the BB.
I’d like to find a tabletop controller with no keys that does similar (just pads, switches, knobs, transport control, etc.) but not having much luck finding a device sans keyboard and having a 5 pin DIN MIDI Out.
I found a couple of controllers that have keys and if I have no luck finding something without, these may be an option, but would prefer no keys. Both do have PC software which appears to be able to program the controller functions. The Novation’s MIDI implemention chart seems to capture most MIDI functions I would want for the BB. The Alesis documentation did not include a MIDI implemention chart.