Born in 1947 in Wales, Percy Jones is a true innovator on the fretless electric bass, with a nimble, fluid, and harmonic-rich style that is uniquely his own. An autodidact, Jones played fretted bass for a number of years before switching to fretless, and his inimitable approach helped to set British jazz-rockers Brand X apart from other fusion outfits on such albums as Unorthodox Behaviour (1976), Morrocan Roll (1976), and Masques (1978). Even as Brand X underwent numerous lineup changes over the years (Phil Collins was the group's first drummer but departed before the recording of Masques), Jones' characteristic tone and touch remained constants across sporadic releases by the group extending into the 1990s. Meanwhile, Brian Eno tapped Jones to contribute atmospheric bass on some of his early forays blending ambient experimentation with pop forms, namely Another Green World (1975) and Before and After Science (1977). Jones also appeared on Eno's more purely ambient Music for Films (1978).