Basically the idea is to buffer a midi file and play it with the Instrument Effects in bukkit on maybe a singular noteblock. http://jd.bukkit.org/doxygen/d7/dd9/namespaceorg_1_1bukkit.html#ac15199725e08e383ade4f6bb222b4855 Although our choices are limited for instruments. I think this would be an awesome project to start. I'm going to delay some of my other projects to start. I just came up with the idea when I saw the Instrument API. I'll let you know when I github the base for it.