Robert Fripp is an English guitarist, composer and record producer. As a guitarist for the progressive rock band King Crimson, Fripp has been the only member to have played in all of King Crimson's line-ups from their inception in the late 1960s to the present. He is the driving creative and political force of the group, bearing responsibility for line-up changes and ending and resuming the group at various points. He has also worked extensively as a studio musician, notably with singer David Bowie on the albums "Heroes" and Scary Monsters (And Super Creeps), Brian Eno, and contributed sounds to the Windows Vista operating system. His complete discography lists more than seven hundred releases over four decades