WIKIPEDIA:

“ Nigel Godrich (born 28 February 1971 in England) is a recording engineer, record producer and musician. He is best known for his work with the English rock band Radiohead and is sometimes referred to as the "sixth member" of the band. He has also been a member of lead singer Thom Yorke's live band, Atoms for Peace, since 2009.
Godrich has also worked with acts such as Paul McCartney, Travis, Beck, Ultrasound, Jason Falkner, Charlotte Gainsbourg, Pavement, Brazzaville, Air, Natalie Imbruglia, The Divine Comedy, The Sundays, U2, and R.E.M.
His production technique is notable for its dense layers of sound.

Biography

Radiohead (1994–present)
Nigel Godrich is sometimes informally credited as the "sixth member" of Radiohead due to his longtime collaboration with the Oxford band. He has gained notice for helping to define Radiohead's distinct sound, which established them as one of the more acclaimed rock bands in the world during the 1990s and 2000s. He is younger than all members of Radiohead (except Jonny Greenwood), which is a rare situation among producers for popular acts. When working on OK Computer at improvised studios without the close supervision of longtime veterans or record labels, both he and the band learned as they went along, ultimately [......] ”

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