=midi setup notes
- desktop (usb) <-----> (usb) bcr2000
- bcr2000 (midi out A) ----> (midi in) codev2
- codev2 (usb) <----> (usb) laptop
bcr2000 in mode U-2 (usb2), which sends midi received from the desktop (on 4-BCR2000 port 2) to the bcr2000's midi out
laptop receives MIDI from bcr2000's out (on Code Port 2)