The mysterious yet singing theme from Rhythm Heaven Megamix's Songbird Remix, which is probably my favourite remix in the series. This song is quite a mish-mash, and even features some brief dubstep-y sections.
I ported this ages ago and showed it off during C3, but I was too lazy to loop it, as the original doesn't loop. Naturally, 3:00 a.m. on a school night is the best time to tackle MML surgery. I wasn't sure how best to loop it, as the song doesn't give many opportunities to do so, but hopefully you enjoy the point I picked.
Special thanks to Nameless for helping me play around with that noise pitchmod buildup thing.