Note that the night stages can be found in the STG_E folder and the day stages in the STG_S folder. In making the ADX I got rid of that second set of data entirely, so you're left with the standard set of ADX tracks instead.
It should be noted that the daytime ADX files actually are in the game as a set of AIX files instead, including the intro and loop sections and then a duplicate of those tracks with a phaser and equalization effect added. I guess we'll have to wait until the OST is released.
Nothing's been tagged because I really don't have any real concrete info on who did what other than Bowling for Soup did Endless Possibility and Ohtani and Nanba seem to have done most of the other BGM.
I spent the better part of the afternoon working on extracting, looping, and compressing some of the various BGM in the game Unleashed.