Isotope was a British jazz-rock band based around guitar

Guitar

The guitar is a plucked string instrument, usually played with fingers or a pick. The guitar consists of a body with a rigid neck to which the strings, generally six in number, are attached. Guitars are traditionally constructed of various woods and strung with animal gut or, more recently, with...

ist Gary Boyle.

Boyle founded the band in June 1972 and a first album, Isotope, was largely composed by keyboardist Brian Miller. Jeff Clyne

Jeff Clyne

Jeffrey Ovid 'Jeff' Clyne was a British jazz bassist .-Biography:...

 was on bass and Nigel Morris was on drums. However, Clyne and Miller left in 1974 to be replaced by Hugh Hopper

Hugh Hopper

Hugh Colin Hopper was a progressive rock and jazz fusion bass guitarist. He was a prominent member of the Canterbury scene, as a member of Soft Machine and various other related bands.-Early career:...

 and Laurence Scott (b. 7 Feb 1946) respectively. After touring, this new line-up recorded Illusion.

Further touring followed and there were various personnel changes. Deep End was recorded in 1976 with two keyboardists, Zoe Kronberger and Frank Roberts. Hopper played on one track, but the bass was otherwise handled by Dan K. Brown.

Boyle subsequently focused on a solo career.

Discography

• Isotope - 1974 (re-issued in 2011 by Cherry Red Records, Esoteric Recordings Label)
• Illusion - 1974 (re-issued in 2011 by Cherry Red Records, Esoteric Recordings Label)
• Deep End - 1976
• Live at the BBC - 2004 (Hux Records), recorded 1973 and 1974 and includes Gary Boyle solo appearances
• Golden Section - 2008 (Cuneiform Records), recorded 1974 and 1975 and featuring Hugh Hopper throughout