So-Lo was produced during a hiatus for Oingo Boingo, following the departure of Hatch and Gibbs. Elfman described the album as "a chance to experiment with slower tempos" and added that "it was fun to do some ballads and try to snap out of that image that a lot of people have of me just writing real fast (...) tunes." The tracks "Cool City" and "Lightning" originated from the 1983 sessions for
Good for Your Soul. Despite rumors at the time of the band breaking up, Elfman later stated that
So-Lo was "not made out of frustration" and that he was more committed to the group than ever before. This was underscored by a 1990 interview for
Music Connection, where Elfman stated that this period marked the closest the band had ever come to breaking up: "Not only were we between labels, but we didn't know where we were going and weren't earning a living at the time and we had guys in the band who weren't a hundred percent into it." In 2020, Oingo Boingo guitarist
Steve Bartek stated that
So-Lo was "mostly a band record", but that MCA "wasn't particularly interested" in Oingo Boingo and so had signed Elfman as a solo artist. However, Elfman wanted to continue the band and convinced MCA to change his recording contract to Oingo Boingo following the release of
So-Lo. =="Gratitude" versions==