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The Dark Side of the Moon (1973)

Pink Floyd recorded The Dark Side of the Moon between May 1972 and January 1973 with EMI staff engineer Alan Parsons at Abbey Road. The title is an allusion to lunacy rather than astronomy. The band had composed and refined the material while touring the UK, Japan, North America, and Europe. Producer Chris Thomas assisted Parsons. Hipgnosis designed the packaging, which included George Hardie 's iconic refracting prism design on the cover. Thorgerson's cover features a beam of white light, representing unity, passing through a prism, which represents society. The refracted beam of coloured light symbolises unity diffracted, leaving an absence of unity. Waters is the sole author of the lyrics.

Released in March 1973, the LP became an instant chart success in the UK and throughout Western Europe, earning an enthusiastic response from critics. Each member of Pink Floyd except Wright boycotted the press release of The Dark Side of the Moon because a quadraphonic mix had not yet been completed, and they felt presenting the album through a poor-quality stereo PA system was insufficient. Melody Maker ' s Roy Hollingworth described side one as "utterly confused... difficult to follow", but praised side two, writing: "The songs, the sounds... the rhythms were solid... saxophone hit the air, the band rocked and rolled". Rolling Stone ' s Loyd Grossman described it as "a fine album with a textural and conceptual richness that not only invites, but demands involvement."

Throughout March 1973, The Dark Side of the Moon featured as part of Pink Floyd's US tour. The album is one of the most commercially successful rock albums of all time. A US number-one, it remained on the Billboard Top LPs & Tape chart for more than fourteen years during the 1970s and 1980s, selling more than 45 million copies worldwide. In Britain, it reached number two, spending 364 weeks on the UK chart. The Dark Side of the Moon is the world's third best-selling album, and the twenty-first best-selling album of all time in the US. The success of the album brought enormous wealth to the members of Pink Floyd. Waters and Wright bought large country houses while Mason became a collector of expensive cars. Disenchanted with their US record company, Capitol Records, Pink Floyd and O'Rourke negotiated a new contract with Columbia Records, who gave them a reported advance of $1,000,000 (US$ 6,178,138 in 2023 dollars). In Europe, they continued to be represented by Harvest Records.