Original sentence: Barrett brought the guitar in a new direction.Barrett was known to have used Binson delay units to achieve his trademark echo sounds.Barrett wrote most of the Floyd's early material.He played several different guitars during his tenure with Floyd, including an old Harmony hollowbody, a Fender acoustic, a Danelectro, and several different Telecasters.He was also an innovative guitarist, with extended techniques he was exploring the musical and sonic possibilities of dissonance, distortion, feedback, the echo machine, tapes and other effects; his experimentation was partly inspired by free improvisation guitarist Keith Rowe.His free-form sequences of sonic carpets, pioneered a new way to play the rock guitar.However, a black Telecaster with mirrored discs glued to the body was the guitar he was most often associated with.One of Barrett's trademarks was playing his Fender Esquire guitar by sliding a Zippo lighter up and down the fret-board through an old echo box to create the mysterious, otherworldly sounds that became associated with the group