I just pick up a Casio540 with no user guide. Does anyone know where I can get one. I will be using it for Cubase mosty. :-[
Are you talking about the MT540? If so theres some information here
http://weltenschule.de/TableHooters/Casio_MT-540.html
If i recall correctly you can inly use midi channels 1-4 with 4 being for syncing the rhythms but i can't remember how to select them.