Jonathan Richard Guy "Jonny" Greenwood (born 5 November 1971) is an English musician and composer best known as the lead guitarist and keyboardist of the alternative rock band Radiohead. A multi-instrumentalist, Greenwood also plays instruments including the bass guitar, piano, viola, and drums, and is a prominent player of the ondes Martenot, an early electronic instrument. He works with electronic techniques such as programming, sampling and looping, and writes music software used by Radiohead. He described his role in the band as an arranger, helping to transform singer Thom Yorke's demos into full songs. He has been named one of the greatest guitarists of all time by publications including the NME, Rolling Stone and Spin.