Isotope was formed by British guitarist Gary Boyle in 1972. Having previously played with Dusty Springfield, Julie Driscoll and Brian Auger and the Trinity and Brit-jazz figures like Mike Gibbs, Keith Tippett and Mike Westbrook, Gary decided to form his own ensemble to explore the new worlds of jazz-rock. The band signed with a large U.K. management company and label and immediately began playing constantly - 4-5 times per week at clubs throughout England and Europe. In May, 1974, bassist and composer Hugh Hopper, formerly of Soft Machine, joined the group and stayed nearly 2 years. Golden Section is over an hour of previously unreleased recordings from 1974-1975, all recorded with Hugh. Isotope's music combined the flavors of contemporary, early 1970s jazz-rock with a distinctive British sound and Hugh's immediately recognizable fuzz-bass sound. The personnel is : Gary Boyle - guitar, Hugh Hopper - bass, Nigel Morris - drums, Laurence Scott - keyboards, with Aureo de Souza - percussion.