This video (taken from the iPad's point of view) shows off MAME's new ability to emulate the MIDI card for the X68000 by running through the SC-55 mode music test in Akumajo Dracula. The iPad is running Roland's official Sound Canvas emulator, set to SC-55 mode.
Because the same Mac was both running MAME and capturing the video there are a few minor timing glitches, but it's quite listenable. Sorry if I cut your favorite song off early :)