Which 1966 Beach Boys album is known for its complex arrangements?

The 1966 Beach Boys album known for its complex arrangements is Pet Sounds. Its intricate harmonies, unusual instrumentation, and layered studio production made it a landmark in popular music.

Brian Wilson produced and arranged most of the album, working with lyricist Tony Asher on much of the material. Because the other Beach Boys were frequently touring, Wilson relied heavily on Los Angeles session musicians, later known collectively as the Wrecking Crew, to record the backing tracks. The band members added their distinctive vocal harmonies afterward.

Pet Sounds expanded the group's sound beyond straightforward surf-pop. Songs such as “God Only Knows” and “You Still Believe in Me” use unexpected chord changes, tonal colors, and carefully stacked vocal parts. “Wouldn't It Be Nice” combines orchestral textures with a driving pop structure, while “Caroline, No” closes the album with an unusually reflective mood. The album was released on May 16, 1966, and is often cited as an influence on The Beatles' Sgt. Pepper's Lonely Hearts Club Band.