<P> The Dark Side of the Moon is the eighth studio album by English rock band Pink Floyd, released on 1 March 1973 by Harvest Records . The album built on ideas explored in earlier recordings and live shows, but lacks the extended instrumental excursions that characterised their earlier work . Its themes explore conflict, greed, the passage of time, and mental illness, the latter partly inspired by the deteriorating mental state of founding member Syd Barrett . </P> <P> Developed during live performances, an early version of the album was premiered several months before recording began; new material was recorded in two sessions in 1972 and 1973 at Abbey Road Studios in London . The group used some advanced recording techniques at the time, including multitrack recording and tape loops . Analogue synthesizers were prominent in several tracks, and snippets from recorded interviews with Pink Floyd's road crew and others provided philosophical quotations throughout . Engineer Alan Parsons was responsible for many distinctive sonic aspects and the recruitment of singer Clare Torry . The album's iconic sleeve was designed by Storm Thorgerson; following keyboardist Richard Wright's request for a "simple and bold" design, it depicts a prism spectrum, representing the band's lighting and the record's themes . </P> <P> Upon its release, The Dark Side of the Moon was a commercial and critical success . It topped the Billboard Top LPs & Tapes chart for a week, and remained on the chart for 741 weeks from 1973 to 1988 . Following a change in methodology in 2009, the album re-entered the chart and has since appeared for over 900 weeks . With an estimated 45 million copies sold, it is Pink Floyd's most successful album and one of the best - selling worldwide . It has been remastered and re-released several times, and covered in its entirety by several acts . It produced two singles--"Money" and "Us and Them"--and is often regarded as one of the greatest albums of all time . </P> <P> Following Meddle in 1971, Pink Floyd assembled for a tour of Britain, Japan and the United States in December of that year . In a band meeting at drummer Nick Mason's home in Camden, bassist Roger Waters proposed that a new album could form part of the tour . Waters' idea was for an album that dealt with things that "make people mad", focusing on the pressures faced by the band during their arduous lifestyle, and dealing with the apparent mental problems suffered by former band member Syd Barrett . The band had explored a similar idea with 1969's The Man and The Journey . In an interview for Rolling Stone, guitarist David Gilmour said: "I think we all thought--and Roger definitely thought--that a lot of the lyrics that we had been using were a little too indirect . There was definitely a feeling that the words were going to be very clear and specific ." </P>

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