Pink Floyd - Dark Side of the Moon (1973)
The band's name and lineup fluctuated regularly until the mid-1960s, when a group known as the Pink Floyd Sound earned themselves a resident gig at the Countdown Club, playing extended sets that lasted until the wee hours of the morning and winning a place in London's emerging underground music scene.
The band's debut, Piper at the Gates of Dawn, was released in 1967, but its lead single "Arnold Layne" was barred from radio play because of a reference to cross dressing, limiting initial sales. Further hindering the band, who had since dropped "the" and "sound" from their name, was the erratic behavior of guitarist Syd Barrett, prompting the addition of a fifth member, David Gilmour, and lots of gossip.
The band would release four more albums on the powerful EMI label (A Saucerful of Secrets, Ummagumma, Atom Heart Mother and Meddle), none of which earned much commercial success, and one of which was described by Gilmour as "a load of rubbish."
While Meddle earned modest critical praise, the albums themselves didn't make much of an impact, but the studio time allowed the band to develop new sound manipulation and production techniques that would shape the songwriting and recording of 1973's Dark Side of the Moon.