PEMBERTON, BC - JULY 19: Chance the Rapper performs during the Pemberton Music and Arts Festival at  on July 19, 2014 in Pemb
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Funk's been buttered all over this year's pop and hip hop—but how about jazz (other than those too-short spots on Kendrick's flawless To Pimp a Butterfly)? Donnie Trumpet & the Social Experiment—a Chicago band featuring Chance the Rapper, Lido, Peter Cottontale (not that Peter Cottontale) and, of course, Chance's buddy and co-conspirator Donnie Trumpet—is here to solve that.

The long-teased album, Surf, dropped by surprise in the wee hours between Thursday and Friday—just days after A$AP Rocky dropped A.L.L.A. a week early without notice. It's on iTunes as a free download right now, 16 songs, 52 minutes of shining weirdness. It's also streaming below.

This joyous news comes with the also-joyous caveat that J. ColeJanelle MonáeBig SeanJeremihErykah BaduBusta RhymesB.o.B. and Noname Gypsy (who's on Chance's Acid Rap gem "Lost") are all on the record as well. And one more time for those in the nosebleeds: Surf is free. It costs no money. To own. Forever.

Surf, like Tyler, the Creator's Cherry Bomb, is unique in that its tracklist doesn't hint which superstars appear where. Fortunately Complex has a breakdown, one we've confirmed on our first glorious listen; Cole's on "Warm Enough," Sean and Jeremih are on "Wanna Be Cool," Migos' Quavo's on "Familiar." The starriest track is No. 2, "Slip Slide," which has B.O.B., BJ the Chicago Kid, Busta and Janelle Monáeezy all together.

To get a better vibe for Donnie Trumpet & the Social Experiment, check out the short film for "Sunday Candy," released in April: