Clif,

I downloaded the owner's manual of Yamaha MFC10 MIDI foot controller and could not find any occurrences of "octave", only one instance of "transpose". I may have to dig deeper into what MIDI signal represents octace up and octave down. I found the only real helpful article on the Web about MFC10 is the following URL:
http://www.sospubs.co.uk/sos/1997_articles/apr97/yamahamfc10.html

MFC10 foot controller looks very promising especially for the owners of Yamaha PSR9000s since it is mentioned to be the preferred foot controller for the 9000s.

Paul Ip
from Texas