Wow, that is even more hardcore than composing in assembler! Hmmm, next time you feel like composing something with your routine (and I very much hope you do feel like that sometimes ), have a look at this software. Being familiar with trackers, you might find that a little more convenient than hacking in DATA statements, hehe. I'm not sure if it provides the same level of flexibility though.
Also yes, the Arc of Yesod tune is quite a gem