It features session percussionist Laudir de Oliveira, who would become a full-fledged band member for the release of Chicago VIII the following year.

[4] While audiences' reactions varied, Chicago greatly enjoyed the experience, decided (after years of talking about it) to record a pure jazz-influenced set of tracks, and headed straight to producer James William Guercio's Caribou Ranch studios to cut their ambitious new album.

[5] While the sessions began well, there was soon dissension within the group about the jazz project, with, reportedly, Peter Cetera and Guercio both wary of the commercial risk of such an undertaking.

Peter Cetera made the biggest strides on Chicago VII, composing "Happy Man" and "Wishing You Were Here" (#11), a lush ballad (signs of the future, taking the band even farther from their original style and sound) that features three of The Beach Boys on backing vocals and which became a big hit in late 1974.

Chicago VII is notable for having writing contributions from all (and only) the members of the band, and for having most of the members stretching out in new ways: Loughnane sang lead ("Song of the Evergreens") and wrote a song, Pankow sang backup, Kath played bass, Cetera played guitar, and Walter Parazaider and Danny Seraphine composed.