John, he means Roland SD-20 Sound Canvas, which doesn't have a midi out or thru.

Davida. You can spend $40 on a little midi thru box (opposite of a midi merge box) like this: http://www.zzounds.com/item--MSLTHRU.

Or, you could buy a USB midi connector like the M-Audio UNO. Do some research.

Then, you should be able to set your midi routing in BIAB and in both your outboard machines to respond to or block whatever midi channels you want. That will take a little fiddling around and some knowledge of midi priciples, but is well worth doing.

Luck, Brad

Brad -- My FAWM