This section, as well as the next two sections, are in the key of E minor. Being reprised several times, this part may be seen as the main theme of the piece. The band then enter with the brass continuing, before the music calms down. Opening with a low Hammond organ note, a brass section swoops in, creating a dramatic effect. It had been previously performed by a number of ensembles including the Conservatoire national supérieur de musique et de danse de Paris ( CNSMDP) in March of 2003 and the Seamus Band on 14 October 2005. David Gilmour joined the gig on the second night at Cadogan Hall. The number was performed live with the involvement of Geesin or any members of Pink Floyd for the first time in thirty-six years on 14 and 15 June 2008 by The Canticum Choir, with the Royal College of Music on brass, Caroline Dale on cello, Ron Geesin on piano, Andrea Beghi on drums, Nadir Morelli on bass, Federico Maremmi on guitar and Emanuele Borgi on the Hammond organ. Years later, Kubrick refused Roger Waters permission to use audio samples from his film 2001: A Space Odyssey on Waters' solo album Amused to Death. It can be seen on a shelf in the music shop scene. Kubrick did, however, include the album cover in the film. Stanley Kubrick wanted to use this track for his film A Clockwork Orange however, the band refused permission. The song was the last Pink Floyd composition which was credited as being co-written by someone outside the band prior to 1979 (not counting Clare Torry's contribution to ' The Great Gig in the Sky', for which she has been retroactively given credit due to a settlement with Pink Floyd). 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. Recording began with the drum and bass parts, recorded in one take for the entire suite, resulting in an inconsistent tempo throughout the song.

Atom heart mother suite french horn