Richard Wright, a fellow architecture student, joined later that year, and the group became a sextet, Sigma 6.
[17] After pressure from his parents and advice from his college tutors, Klose quit the band in mid-1965 and Barrett took over lead guitar.
[1] In December 1967, reaching a crisis point with Barrett, Pink Floyd added guitarist David Gilmour as the fifth member.
[20] For the Dark Side of the Moon Tour in 1973, the band were joined by saxophonist Dick Parry,[21][22] as well as by backing singers Nawasa Crowder, Mary Ann Lindsey and Phyllis Lindsey from March – June 1973,[21] Billy Barnum, Venetta Fields and Clydie King in October 1973,[23] and Vicki Brown, Liza Strike and Clare Torry at "A Benefit for Robert Wyatt", 4 November 1973.
[28] For The Wall tour, Wright was re-hired as a contracted musician,[29] alongside Andy Bown on bass guitar, Snowy White on guitars, Willie Wilson on drums and percussion, Peter Wood on keyboards, and backing singers Joe Chemay, Stan Farber, Jim Haas, John Joyce.
After recording, The Final Cut (1983), without Wright, Waters left the band, following tentions with Gilmour and Mason.
Pink Floyd played one show in 1990, backing musicians included Pratt, Carin, Renwick, Wallis and D. McBroom, alongside keyboardist Michael Kamen, saxophonist Candy Dulfer, and backing vocalists Sam Brown, Vicki Brown and Clare Torry.
[34] Waters rejoined Gilmour, Wright and Mason at Live 8 in 2005, the band were supported by Carin on additional keys and lap steel, and Renwick on guitar and bass.
[35] Wright, Gilmour and Mason played at the Madcap's Last Laugh concert in Tribute to Syd Barrett who died in 2006.