Despite their legacy as soft rock giants, the reality is Chicago never stay in one place for long. The cowbell machismo that soaks “Listen” reflects the big rock moves of their late ‘60s/early '70s albums, and “Gone Long Gone,” recorded a decade later, is disco pop laced with smooth harmonies. “Feel (With Horns)” finds them embracing 21st-century pop with its looped drums and country-tinged chorus.