The new firmware "green-5" is is now able to play MIDI files directly from the SD card. Well, "play" might be a bit misleading. In fact it generates the CV and gate patterns that reflect the notes in the file's MIDI tracks, but that makes it even more flexible. Up to eight voices per track are supported with different patterns of voice allocation. If you like you can ignore the track's internal speed and clock it externally, just as a sequencer.