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When Roger Waters heard David Gilmour playing the guitar parts for this track, he said that he thought it sounded like the theme song from the western film The Magnificent Seven. Roger Waters and Nick Mason had to play for twenty-three minutes straight. Recording began with the drum and bass parts, recorded in one take for the entire suite, resulting in an inconsistent tempo throughout the song. Pink Floyd performed it live between 19, occasionally with a brass section and choir in 1970–71. At 23:38, it is Pink Floyd's longest uncut studio piece. It appeared on the Atom Heart Mother album in 1970, taking up the first side of the original vinyl record. " Atom Heart Mother" is a six-part suite by the progressive rock band Pink Floyd, composed by all members of the band and Ron Geesin. Musical composition by Pink Floyd and Ron Geesin "Atom Heart Mother"
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