The album's credits include Clare Torry, a session singer and songwriter, and a regular at Abbey Road. She had worked on pop material and numerous cover albums, and after hearing one of those albums Parsons invited her to the studio to sing on Wright's composition "The Great Gig in the Sky". She declined this invitation as she wanted to watch Chuck Berry perform at the Hammersmith Odeon, but arranged to come in on the following Sunday. The band explained the concept behind the album, but were unable to tell her exactly what she should do. Gilmour was in charge of the session, and in a few short takes on a Sunday night Torry improvised a wordless melody to accompany Wright's emotive piano solo. She was initially embarrassed by her exuberance in the recording booth, and wanted to apologise to the band only to find them delighted with her performance. Her takes were then selectively edited to produce the version used on the track. For her contribution she was paid £30, equivalent to about £ in . In 2004, she sued EMI and Pink Floyd for 50% of the songwriting royalties, arguing that her contribution to "The Great Gig in the Sky" was substantial enough to be considered co-authorship. The case was settled out of court for an undisclosed sum, with all post-2005 pressings crediting Wright and Torry jointly.