In 2015, Chance joined a band called Donnie Trumpet & The Social Experiment for a quirky album called "Surf." The Social Experiment is a collective of Chicago-based musicians.
The album is structured differently: The artist names aren't included in the track titles, and different songs appeared on the Soundcloud accounts of different musicians instead of being collected together in one place. It would have never happened at a commercially driven record label.
More importantly, the music was a stylistic departure for Chance. His vocal performance was still rap, but it's not really a rap album. The whole thing takes a jazzy and explicitly Christian tone. The highlight is a track called "Sunday Candy." Chance codirected the music video.