The Beatles – Sgt. Pepper’s Lonely Hearts Club Band
Considered one of the earliest art rock LPs and a precursor to progressive rock, Sgt. Pepper is a pivotal piece of British psychedelic music. It combines a variety of styles, including as Western and Indian classical music, circus, music hall, and avant-garde. Many of the recordings were colored with sound effects and tape manipulation with the help of Geoff Emerick and George Martin.