Hello !
The SD1 will allow you store midi files on the hard drive . You can go to song play and have access to any folder you create for midi files on the hard drive . You have a feature called Juke Box . This allows you to play the song and scroll to next song and press the function button that corresponds to " next play " . Easy ! Very Easy !
Now ....you also have a dedicated folder called demo & hit . This folder allows you to have 999 midi sequences available for playback with in 2 seconds ......The SD1 also allows you to mute all parts except for drums and bass INSTANTLY ! This is very effective ....... That's it ...... Dan O