Much of it reflected chief architect Roger Waters’ dim view of the concert experience as rock expanded into arenas and stadiums. Success continued into the Eighties with The Wall, a four-sided epic about a rock star named Pink who suffers a nervous breakdown while on tour. It was a preoccupation of Pink Floyd’s that would later surface in songs like “Set the Controls for the Heart of the Sun” (from A Saucerful of Secrets) and the group’s masterwork, Dark Side of the Moon. Pepper, possibly the defining moment of English psychedelia and Syd Barrett’s magnum opus.” Among its highlights was a nine-minute instrumental, “Interstellar Overdrive,” that represented one of rock’s first forays into deep space. As the British music magazine Q opined in 1995, “Piper at the Gates of Dawn is, even counting Sgt. Pink Floyd’s debut album, Piper at the Gates of Dawn, is a classic of psychedelic whimsy that epitomized the remarkable year of 1967 at its most playful and creative. Singer-guitarist Syd Barrett provided Pink Floyd with most of its original early material, including the British hits “See Emily Play” and “Arnold Layne.” Barrett’s elfin, tuneful psychedelia made him the Lewis Carroll of the pop scene. Before they settled on Pink Floyd, the group went by the names Sigma 6 and the Architectural Abdabs, and they mainly performed rhythm and blues covers.