If you got recorded Midi track and wanted to import in to Music Maker then click on File Manager choose where your midi track is located such as on computer/My Music/My Doucment or on Flash Drive/External Drive then browse and locate. After locating if you click once it will be played if you DRAG n Drop on Music Maker arranger the track will be added in Music Maker.
Additional: or if you want to connect synthesizer read pdf