I have not used the cso/mid converter yet, but I would strongly suggest
that the person who coded it looked at
http://www.interlinx.qc.ca/~kami/tutorial.htm

The document talks about channel 10 and reserving channels for instruments
that use alternative tunings and permanent pitch bend. I would be very
happy to provide feedback if such features were to be added.

-Kami

** I am a peach tree, 
** Blossoming in a deep pit.