Fourth studio album by Santana, released on October 11, 1972. It marked a major turning point in Carlos Santana's career as it was a sharp departure from his critically acclaimed first three albums. The sound contrasted greatly with Santana's trademark fusion of salsa, rock, and jazz, and concentrated mostly on jazz-like instrumental passages. The album is the first among a series of Santana albums that were known for their increasing musical complexity, marking a move away from the popular rock format of the early Santana albums toward a more contemplative and experimental jazz sound.