Through USB, but I cant find the drivers so doremi dont recognise the controller.
ruboteca, first your computer should recognize your keyboard then only doremi can recognize any midi events. Are you sure your computer recognizes your midi keyboard ?
Secondly, there are no drivers specially for doremi. Drivers are for keyboards, and keyboard manufacturer generally provides them along with keyboards. You can also download it from manufacturer’s site. For example i had received Yamaha USB drivers with my Yamaha keyboard.
I don't understand what do you mean when you say you want to make songs for 2 octaves !
1) Do you mean you want to merge a 5 octave song in 2 octaves? If yes, then this will be really weird
and you will lose whose essence of the song. I don't think any midi application supports this.
2) If you mean there are other midi instruments in which are taking more than 2 octaves and you want to get rid of those? Then simply use any free midi editor, dissolve song into individual tracks and delete the tracks which you don't want.